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• Al 2 O 3 modified epoxy-glass fiber composites were successfully prepared and tested. • The composite material with 2 %Al 2 O 3 filler has the best comprehensive mechanical properties. • Thermal conductivity increased by 20%; the specific heat capacity is increased by 30%. • Burning time increased by 10 s. • The mechanical properties of the samples prepared by vacuum diversion process are better. The present study intends to use Al 2 O 3 as thermal conductivity filler, epoxy resin as matrix, and glass fiber as reinforcement material, and prepare Al 2 O 3 modified epoxy-glass fiber composite materials through vacuum diversion flow and hand paste molding. By changing the amount of Al 2 O 3 , performance tests and comparison are conducted. The results show that when the content of Al 2 O 3 filler is 2 %, the comprehensive mechanical properties are the best, the thermal conductivity is increased by about 20 %, the specific heat capacity is increased by about 30 %, and the combustion time is also increased by 10 s. [ABSTRACT FROM AUTHOR]

• A novel two-step solid-state synthesis was used to produce pure CeAlO 3 powder. • SPS was used to achieve a fully dense cerium aluminate polycrystalline ceramic. • First-time thermal and electrical properties of the sintered material were measured. Cerium aluminate was synthesized and sintered using a solid-state method followed by Spark Plasma Sintering. This combination leads to fully dense materials. This study presents a novel two-step solid-state synthesis method for CeAlO 3 via the control of intermediary reactants, highlighting its potential for obtaining high-purity CeAlO 3- based ceramics. The sintered material's thermal and electrical properties were characterized. The results provide insights into the synthesis and properties of CeAlO 3 like an electrical conductivity of 2.9 10-8 S.cm−1 and a thermal conductivity of 4.5 W.m−1. K−1. [ABSTRACT FROM AUTHOR]

• The composite films of compact ZnO and ZnO nanorod (NR) with polymer are fabricated. • ZnO NR composite films exhibit enhanced thermal conductivity. • Enhancement occurs mainly due to grain boundary phonon scattering. • The thermal diffusivity of ZnO NR composite film at room temperature is 0.53 mm2/s. Herein, we have investigated the thermal properties of compact and vertically grown ZnO nanorods (NRs)/poly(3,4-ethylenedioxithiophene):poly(4-styrenesulfonate) (PEDOT:PSS) composite film. The ZnO NR arrays with length 885 ± 5 nm have been grown using the sol–gel method. Furthermore, composite films of compact-ZnO and ZnO NR with PEDOT:PSS have also been grown. The temperature-dependent thermal conductivity for both the composite films has been investigated in the temperature range of 273–353 K. The thermal conductivity of compact-ZnO/PEDOT:PSS is found to be in between 1.43–1.49 W/mK. The thermal conductivity is found to be enhanced significantly in the case of ZnO NR/PEDOT:PSS composite film. [ABSTRACT FROM AUTHOR]

[Display omitted] • A new type of FSCPCMs with a wide phase change temperature range were designed. • The latent heat of the prepared FSCPCMs could reach 142.5 J/g. • The FSCPCMs exhibit good thermal conductivity and thermal stability. Phase change materials (PCMs) with wide phase change temperature range, high latent heat, good thermal conductivity, and shape stability are essential for applications such as solar energy conservation and thermal management of electronic devices. Form-stable composite PCMs (FSCPCMs) with a broad phase change temperature range of 18–65 °C were successfully developed by using a mixture of eicosane and paraffin mixture along with cross-linking polyurethane as PCM, expanded graphite as thermally conductive filler and supporting material. The prepared FSCPCMs demonstrated excellent thermal stability and thermal conductivity with a latent heat up to 142.5 J/g. In conclusion, the synthesized FSCPCMs exhibit promising potential for practical applications in thermal energy storage. [ABSTRACT FROM AUTHOR]

[Display omitted] • BNNS/ANF thermal conductivity insulating fibers were prepared via sol–gel wet spinning. • BNNS and ANF are connected to form a stable three-dimensional network structure. • The fibers have excellent mechanical properties and thermal conductivity. With the intensification of global warming and the occurrence of extremely hot weather, there is an urgent need for textiles that can effectively regulate temperature. Using amino-functionalized boron nitride nanosheets (K-BNNSs) and aramid nanofibers (ANFs) as materials, the well-oriented thermally conductive insulating textile fibers with "lotus root" structure were directly prepared by sol–gel wet spinning process. The axial thermal conductivity of a single fiber can be as high as 22.4 W/(m·K), and has an excellent tensile fracture strength (176.6 MPa). Thermal infrared imaging revealed that the fibers woven into textiles had a more significant heat dissipation capacity than commercial cotton fabrics. The fiber obtained by this low-cost preparation method provides a cooling textile with excellent heat-dissipation ability and has wide application prospects in emerging textiles. [ABSTRACT FROM AUTHOR]

This work reports a composite film using (3-Aminopropyl)triethoxysilane-modified boron nitride nanosheets (BNNS) incorporated in the aramid nanofibers (ANF) network via sol–gel method. High-resolution TEM, SEM, XPS, and XRD outcomes confirmed the imitation pearl layered structure—BNNSs as thermal conductive fillers were layer-by-layer overlapped on ANF. The reasonable coordination between interfaces and fillers stimulated the thermal conductivity (35.4 W/(m·k)) of composite film i.e., 338.43% higher than that of ANF. The composite film exhibited good cyclic thermal stability, high tensile strength (65.9 MPa), and high volume resistivity (2.424×1015 Ω∙cm). [Display omitted] • BNNS@APTES/ANF with imitation pearl layered structure was prepared via sol–gel method. • BNNS as thermal conductive fillers were layer-by-layer overlapped on the ANF. • High thermal conductivity of BNNS@APTES/ANF was 35.4 W/(m·k) higher than pure ANF. • BNNS@APTES/ANF exhibited excellent tensile property and high volume resistivity. • The thermal conductivity of BNNS@APTES/ANF did not decay during 8 cooling/heating cycles. This work reports a composite film using (3-Aminopropyl)triethoxysilane-modified boron nitride nanosheets (BNNS) incorporated in the aramid nanofibers (ANF) network via sol–gel method. High-resolution TEM, SEM, XPS, and XRD outcomes confirmed the imitation pearl layered structure—BNNSs as thermal conductive fillers were layer-by-layer overlapped on ANF. The reasonable coordination between interfaces and fillers stimulated the thermal conductivity (35.4 W (m·k)-1) of composite film i.e., 338.43 % higher than that of ANF. The composite film exhibited good cyclic thermal stability, high tensile strength (65.9 MPa), and high volume resistivity (2.424 × 1015 Ω∙cm). [ABSTRACT FROM AUTHOR]

• SiC p /Al composites were prepared based on Fused Deposition Modelling (FDM) • Higher SiC volume fraction were obtained compared to other additive manufacturing methods. • complex-structure composites were prepared with excellent properties. SiC p /Al composites are widely used in space vehicles, electronic packaging, automobiles, rail vehicles and other fields due to their excellent mechanical and thermal properties. Complex-shaped SiC p /Al parts are usually manufactured by mechanical processing, which is expensive and time-consuming due to the high hardness of SiC phase. As a highly effective 3D molding method, Fused Deposition Modelling (FDM) of the complex-structure SiC p /Al composites was reported for the first time in this paper. SiC p /Al composites was densified by pressureless infiltration after FDM, and as-acquired bulk possessed high densification of 92.67 % and the SiC volume fraction of 43.2 %. Moreover, excellent performances were also presented, including flexural strength of 211 MPa, thermal conductivity of 112(W/m·K), and the thermal expansion coefficient of 8.67 × 10-6K−1. [ABSTRACT FROM AUTHOR]

• Cu/Fe/Kovar composites have a much better thermal conductivity than Kovar alloys. • Good thermal conductivity of Cu/Fe/Kovar composites is attributed to the formation of Cu network. • Fe interlayer decreases the mutual diffusion between Cu coating and Kovar alloy matrix. To improve the thermal conductivities of Kovar alloys (4J50), Fe and Cu coatings were prepared on surfaces of one of Kovar alloys (4J50) powders by electroless plating and Cu/Fe/Kovar composites were hot-pressing sintered. The Fe interlayer is prepared to decrease the mutual diffusion between the Cu coating and the Kovar alloy matrix. Since the existence of Cu network in the composites, the composites present a better thermal conductivity than Kovar alloys. The Cu/Fe/Kovar composites containing 10 wt% and 20 wt% Cu have a thermal conductivity of 24.7 W/(m·K) and 25.8 W/(m·K), respectively, which is 48 % and 54 % higher than that of the Kovar alloy (16.7 W/(m·K)). Due to the presence of Cu network, the coefficients of thermal expansion of the composites is slightly higher than that of the Kovar alloy. The method reported in this study can be also applied to improve the thermal conductively of other Kovar alloys. [ABSTRACT FROM AUTHOR]

• Measured through-thickness thermal conductivity of 2 × 2 twill carbon fabric using C-Therm Trident system with MTPS sensor. • Thermal conductivity is reduced by 38% under vacuum, attributed to presence of air in the porous structure of the fabric. • Layup thickness/configuration have negligible impact on thermal conductivity due to limited heat penetration. • Higher fabric compaction increases thermal conductivity owing to improved fibre nesting and contact. For high-fidelity simulation of heat transfer responses during various composite manufacturing processes involving heat, thermal conductivity (TC) of dry carbon weaves is essential. In this paper, the through-thickness TC properties of a 2 × 2 carbon twill weave are presented, employing a state-of-the-art C-Therm Trident module equipped with a Modified Transient Plane Source (MTPS) sensor. The effects of air presence, layup thickness, layup configuration, and fabric compaction on TC are investigated. Results reveal negligible impacts of layer number and configuration on TC. However, TC is significantly influenced by air presence and stack compaction. These findings provide improved comprehension of heat transfer in textile composites for more accurate process modelling and simulation using homogenized models. [ABSTRACT FROM AUTHOR]

• An innovative adsorbent has been developed using cost-effective graphite powder. • Surface area and pore volume of silica gel are 659.48 m2/g and 0.841 cm3/g. • 93 % SG + 5 % graphite powder + 2 % PVA have good thermal conductivity. • The developed adsorbents have high thermal stability and desorption rate. This research work discusses the development and testing of innovative composite adsorbents made of silica gel (SG), polyvinyl alcohol (PVA) binder and graphite powder (GP). The investigation examines the specific surface area, thermal conductivity, pore volume, adsorption, and desorption rate of the synthesized composite adsorbent. Out of the various formulations, Composite A (composed of 93 % SG, 5 % GP, and 2 % PVA) demonstrates the specific surface area of 530.37 m2/g and pore volume of 0.497 cm3/g. It is noteworthy that Composite A exhibits a 14 % improvement in thermal conductivity and a 3 % increase in desorption rate when compared to its original material, while consistently maintaining the requisite mass transfer characteristics. There is significant improvement in the thermal conductivity of the composite adsorbents with the addition of more than 5 % GP. However, in addition to this enhancement, there is a reduction in adsorption capacity. X-ray diffraction investigation indicates that the composite adsorbents are thermally stable. FESEM investigation reveals that the composite A exhibit no signs of agglomeration. The suggested composite adsorbent show superior thermophysical attributes compared to both pure and silica gel-based composites, making them promising for achieving optimal performance in adsorption cooling systems (ACS), particularly with respect to the specific cooling power (SCP) and coefficient of performance (COP). [ABSTRACT FROM AUTHOR]

• Low-temperature sintered AgNPs pastes were quickly prepared in batches. • The organic shell can effectively avoid the spontaneous bonding of AgNPs. • Citric acid can remove the native oxide layer and promote sintering activity. • After sintering at 220 °C for 30 min, the thermal conductivity exceeded 200 W/mK. This study developed a low-temperature pressureless sintered Ag nanoparticles (AgNPs) paste with high thermal conductivity (TC), which can be produced on a large scale through rapid pre-treatment. Commercially available unmodified AgNPs were coated with polyvinylpyrrolidone (PVP), and subsequently, citric acid (CA) was used to remove the native oxide layer from the AgNPs surface and improve sintering activity. Compared to the treatment strategy of CA activation followed by PVP coating, applying PVP coating prior to CA activation could prevent their spontaneous bonding that will significantly promote the formation of large grains and strong sintering necks, reducing the interface scattering and leading to an ultra-high TC (≥200 W/mK), thereby meeting the packaging requirements of high-power electronic applications. [ABSTRACT FROM AUTHOR]

• Radial structure is designed to enhance the thermal conductivity. • Composites with radial structure were prepared by hot pressing sintering. • Composites' thermal conductivity is 10 times higher than laminated composites. To obtain highly thermally conductive materials in both the X-Y and Z directions, a reinforcement phase macrostructure design was used to improve the thermal conductivity (TC) of the composites. We fabricated copper matrix composites with a radial graphite film skeleton via fast hot pressing technology. The results showed that the radial structure design was an effective strategy. The TC in the Z-direction of composites with radial structures is 10 times higher than that of laminated composites while maintaining a high TC in the X-Y direction. The TC of the composites was 778 W/mK in the X-Y direction and 287 W/mK in the Z direction when the graphite films were at a 20 % volume fraction. Composites have the potential to become thermal management materials. [ABSTRACT FROM AUTHOR]

• New strategy is proposed to design and synthesize diamond/Ag/Cu composites. • Diamond/Ag/Cu-Ti composites were fabricated via low-cost pressureless sintering. • TiC phase formed at interface demonstrates improved diamond–matrix wettability. • The thermal conductivity of composite is maximized at 40 at.% Cu in the matrix. • Diamond/Ag/Cu composites are promising thermal management materials. Diamond/Ag/Cu–Ti composites were fabricated by low-cost pressureless sintering with Ti addition to improve the diamond–metal matrix wettability and the effects of Ag/Cu matrix variation on the composites were investigated. Transmission electron microscopy identified the interfacial structure on the diamond (1 0 0) plane of the diamond/Ag/Cu–Ti composite with the 80 at.% Cu matrix as Cu–Ag/TiC/Ag–C/TiC/diamond. The thermal conductivity of the diamond/Ag/Cu–Ti composites was significantly enhanced upon increasing the Ag contents of the Ag/Cu matrix. The 60 vol% diamond/Ag/Cu–2 at.% Ti composite with 40 at.% Cu matrix content exhibited the maximum thermal conductivity of 826 W/m·K and the compatible coefficient of thermal expansion of 6.0 ppm/K. The diamond/Ag/Cu-Ti composites are promising low-cost thermal management materials for electronic device integration. [ABSTRACT FROM AUTHOR]

• Doped CoSb 3 skutterudite nanopowder synthesized by physical vapor technique. • Nanostructured CoSb 3 fabricated by spark plasma sintering. • Thermal conductivity reduction by nanostructuring – demonstrated in doped CoSb 3. In this study, Fe 0.04 Co 0.96 Sb 3 nanopowder was synthesized using radio frequency induction plasma, starting from mechanically milled Fe, Co, and Sb powders. The as-synthesized powder was found to contain CoSb 3 , FeSb 2 , CoSb, and elemental Sb. Annealing of the synthesized powder at 600 °C for 12 h under argon atmosphere increased the fraction of CoSb 3. Spark plasma sintering of the annealed powder was carried out at 625 °C under 60 MPa pressure for fabrication into bulk nanostructured material. Thermal conductivity (k) of disks thus fabricated was found to be 1.78 ± 0.16 W/m.K at room temperature, which is significantly lesser than its microcrystalline counterpart (5.58 ± 0.60 W/m.K). Such a reduction in k could mainly be attributed to the enhanced phonon scattering occurring at the grain boundaries and interfaces present in the bulk nanostructured Fe 0.04 Co 0.96 Sb 3 sample, which is an added advantage for its use in the thermoelectric devices. [ABSTRACT FROM AUTHOR]

• A series (1-x)ZrO 2 - x TaO 2.5 ceramics are synthesized by solid state reaction. • The final product of 0.72ZrO 2 -0.28TaO 2.5 is mainly composed of TaZr 2.75 O 8. • TaZr 2.75 O 8 has good mechanical properties and excellent phase stability. • Thermal conductivity of the TaZr 2.75 O 8 bulk is lower than that of YSZ. • TaZr 2.75 O 8 has a moderate thermal expansion coefficient, around 9.14 × 10−6 K−1. A series of TaO 2.5 -doped ZrO 2 (1-x)ZrO 2 - x TaO 2.5 (x = 0.08, 0.15, 0.2 and 0.28) ceramics were synthesized by solid state reaction at 1600 °C for 20 h. XRD results reveal that no tetragonal ZrO 2 phase forms in the TaO 2.5 –ZrO 2 system. Instead, a mixture of monoclinic ZrO 2 (m -ZrO 2) and orthorhombic TaZr 2.75 O 8 can be detected for (1-x)ZrO 2 - x TaO 2.5 ceramic within compositions x ≤ 0.2. As the doping content increases, the content of m -ZrO 2 decreases and the final product in the composition of 0.72ZrO 2 -0.28TaO 2.5 is primarily composed of TaZr 2.75 O 8. Microstructure together with the thermophysical and mechanical properties of TaZr 2.75 O 8 ceramic were investigated for possible applications as thermal barrier coatings (TBCs). The thermal conductivity with a minimum value of 1.65 W/m·K at 800 °C for TaZr 2.75 O 8 ceramic is ∼30% lower than that of dense YSZ and the dense ceramic also has a moderate average thermal expansion coefficient (TEC), about 9.14 × 10−6 K−1 from room temperature (RT) to 1300 °C. Besides, TaZr 2.75 O 8 exhibits a high microhardness (11.85 ± 0.42 GPa) and fracture toughness (3.15 MPa·m1/2). These preliminary results indicate that TaZr 2.75 O 8 can be used as an alternative material for the ceramic layer in TBCs system with respect to its superior thermal and mechanical properties. [ABSTRACT FROM AUTHOR]

Graphical abstract Highlights • Purification treatment is important to enhance nanocomposite performance. • Thermal properties can be significantly improved after purification treatment. • Highly purified carbon nanotubes are effective in improving thermal conductivity. • Thermal conductivity can be improved up to four times higher than the matrix. • Purified carbon nanotubes are not benefit for electrical conductivity. Abstract The effect of carbon nanotube (CNT) purification treatment on the thermal and electrical properties of epoxy nanocomposites was investigated. The results indicated that purification treatment can significantly affect nanocomposite performance including thermal and electrical properties. Highly-purified single-walled carbon nanotubes (SWCNTs) have the potential to significantly improve the thermal conductivity of polymer nanocomposites, but are unfavorable for electrical properties due to their inability to form an effective percolating network. The thermal conductivity can be improved up to four times higher than the polymer matrix, demonstrating the significance of CNT purification treatment in improving nanocomposite performance. The electrical conductivity of polymer nanocomposites is more sensitive to purification treatment than their thermal conductivity. [ABSTRACT FROM AUTHOR]

Highlights • GO with large lateral size (∼50 μm * 50 μm) is directly prepared by an "ultrasonication-free" exfoliation. • Polyimide is in situ synthesized, as a solder, to "molecular weld" the GO sheets up to enlarge the lateral size. • The LGO/PI hybrid film achieves a superior in-plane thermal conductivity. Abstract In this letter, we report an "ultrasonication-free" direct exfoliation method to obtain graphene oxide with large lateral size (LGO). The average size of LGO sheets is about 50 μm * 50 μm. The g-LGO film shows a superior in-plane thermal conductivity after the graphitization treatment. Furthermore, the in situ "molecular welding", using polyimide (PI) to weld up the GO sheets, is conducted to improve the performance of hybrid thermal conducting film. The thermal conductivity of g-LGO/PI film is 1053.975 ± 8.762 W m−1 K−1, superior to that of the g-LGO film and g-SGO/PI. The direct preparation method to obtain GO with large lateral size, followed by such an in situ "molecular welding" strategy by PI, provides a promising way to fabricate graphene-based film for efficient thermal management. [ABSTRACT FROM AUTHOR]

Highlights • The processing time of samples can be reduced from a few days to half an hour. • The thermoelectric properties can be improved significantly by changing synthesis pressures. • The maximum ZT value of 1.23 was obtained for In 0.05 Ba 0.15 Co 4 Sb 11.5 Te 0.5 sample prepared at 2 GPa. Abstract In order to investigate the synergistic effect of ion doping and pressure regulation, Te has been chosen as the doping element to prepare In 0.05 Ba 0.15 Co 4 Sb 11.5 Te 0.5 materials at various synthesis pressures by high pressure and high temperature (HPHT) method. The electrical transport properties of the samples have been optimized effectively by Te doping, and the lattice thermal conductivities have been further reduced through introducing defects by high synthesis pressure. In the whole synthesis pressure range, the overall performances of samples increase with increasing synthesis pressures. The minimum lattice thermal conductivity of In 0.05 Ba 0.15 Co 4 Sb 11.5 Te 0.5 sample prepared at 2.0 GPa reached 1.02 W m−1 K−1. Combined with the relative high power factor, a maximum ZT value of 1.23 has been reached. [ABSTRACT FROM AUTHOR]

Highlights • Ceramic foams were produced from vitrified bottom ashes by a simple foaming method. • A couple of inorganic Ca- and B-based salts were used as foaming co-agents. • These macroporous ceramic foams show promise for use as thermal insulating materials. Abstract Recycling is a key environmental issue due to the decrease in global natural resources and constant increase of solid wastes. In this context, we used vitrified bottom ashes from municipal solid waste incinerators as a starting material to produce porous ceramics by employing inorganic salts as foaming agents. These ceramic foams, consolidated through a process of sinter-crystallization, exhibited a three-dimensional network of open pores (total porosity 64 vol%, mean pore size 292 µm) and a compressive strength of ∼2 MPa. The thermal conductivity (∼0.13 W/mK) showed promise for the potential use of these foams as thermal insulating materials. [ABSTRACT FROM AUTHOR]

Highlights • A die attach adhesive was designed with cross-linked epoxy-silicone and fused silica. • Both high thermal conductivity and low viscosity are achieved. • Similar refractive indexes of matrix and filler results in high transmittance. • Epoxy-silicone improves the adhesion to the bonding surfaces comparing with silicone. • The improved thermal, optical and reliability performance of LEDs are achieved. Abstract High thermal conductivity, low viscosity and high transparency are desired properties of die attach adhesives (DAA) for LEDs to achieve high thermal and optical performance as well as good reliability. However, it is challenging for DAAs with thermally conductive fillers to keep a low viscosity and high transparency. In this paper, a novel DAA with designed hyper-branched epoxy-silicone and surface modified fused silica was formulated to improve the thermal conductivity without sacrificing high transparency and low viscosity. Compared with a widely used commercial DAA, 165% thermal conductivity improvement and 83% viscosity reduction are achieved, resulting in 26% thermal resistance reduction, 7% light extraction enhancement, and 14% less lumen degradation in accelerate aging test for mid-power LED packages. [ABSTRACT FROM AUTHOR]

Highlights • Ti x Co 4 Sb 11.5 Te 0.5 was synthesized via 5 min microwave heating for the first time. • The uniform fine grain size of Ti 0.3 Co 4 Sb 11.5 Te 0.5 is ∼2 μm. • The lattice thermal conductivity of Ti 0.3 Co 4 Sb 11.5 Te 0.5 is 2.22∼4.37 Wm−1 K−1 respectively. • The highest ZT of 0.60 for Ti 0.3 Co 4 Sb 11.5 Te 0.5 was achieved at 773 K. Abstract In the present wok, a series of Ti-filled and Te-doped skutterudite compounds Ti x Co 4 Sb 11.5 Te 0.5 (x = 0.2, 0.3, 0.5) were successful fabricated by combination of microwave synthesis and spark plasma sintering technique. The microstructure and thermoelectric properties of Ti x Co 4 Sb 11.5 Te 0.5 bulks have been investigated systematically. The experimental results show that nearly single phase skutterudite were obtained by 5 min microwave synthesis. The Ti 0.3 Co 4 Sb 11.5 Te 0.5 bulk has smallest and uniform grain size of about 2 μm. The influences of Ti concentration on thermoelectric properties were discussed. A highest ZT of 0.60 for Ti 0.3 Co 4 Sb 11.5 Te 0.5 was achieved at 773 K along with a total thermal conductivity of 3.72 W m−1 K−1, one might obtain higher values at a higher temperature. [ABSTRACT FROM AUTHOR]

• Maximum improvement of 28.11% is noted in thermal conductivity at 2 wt% of CuO. • Reduction of 11.32% in melting point at 2 wt% concentration of CuO. • Addition of binary mixture of CuO-GnP to paraffin shows improved thermal properties. • 150.69% enhancement in thermal conductivity on addition of CuO-GnP mixture to PCM. This paper presents the experimental investigation on the thermal properties of mono and hybrid nanoPCM. Paraffin wax (PW) as base PCM is doped with CuO nanoparticles and CuO-GnP binary mixture respectively. CuO weight fraction is varied in PW from 0.5% −2.5%. The maximum improvement of 28.11% is noted in thermal conductivity at 2 wt% of CuO. GnP with loading levels of 0.5% − 2% are added to PW having constant wt% of CuO. The maximum improvement of 150.69% in thermal conductivity occurs at 1.5 wt% of GnP. Differential scanning calorimetry analysis shows latent heat and melting point of pure PW is reduced by 3.68% and 11.32% at 2 wt% concentration of CuO. On addition of GnP to the PW/CuO composite, the latent heat and melting point of PW/CuO GnP composite increases upto 1.5 wt% of GnP. Hence addition of CuO-GnP hybrid mixture to paraffin is viable solution for management of thermal energy storage. [ABSTRACT FROM AUTHOR]

• Thin and porous polyamide film for radiative cooling utilization is investigated. • The pore feature size exerts important influence on optical-infrared properties. • The film with average pore size of 0.45 μm offers excellent spectral selectivity. • Cooling performance is confirmed by using IR camera. • Cooling performance is further explained by using radiative thermal conductivity. In this work, optical-infrared properties depended on pore size are investigated for four PA films with different pore feature size, but similar thickness and porosity. It is obtained that these nano/micro-scaled pores embedded in PA film effectively scatter visible light to make it opaque without compromising the MIR transparency. It is also found that both spectral transmittance and reflectance increase as the pore feature size of PA film decreases. At the average pore size of 0.45 μm, the porous film can achieve a high infrared transmittance of 0.92 in the wavelengths of 7–14 μm. In addition, the reflectance of the 0.45@PA film can reach 0.93 in the wavelengths of 0.38–1.0 μm, making it also attractive for outdoor radiative cooling applications. [ABSTRACT FROM AUTHOR]

Ultrahigh thermal conductivity Cu/graphite membrane composite with continuous well-packed laminate structure is prepared by tape casting with hot-pressing sintering. As-prepared composite material has anisotropic thermal properties with ultrahigh in-plane thermal conductivity and low in-plane coefficient of thermal expansion because of its extraordinary packed laminate structure. Thermal properties of Cu/graphite membrane composite can be designed according to requirements by adjusting volume fraction of graphite membrane in the composite. The maximum value of Cu/graphite membrane composite (50 vol% graphite membrane) in-plane thermal conductivity is 1005  W · m - 1 K - 1 , while the minimum value of the in-plane coefficient of thermal expansion is 7 × 10 - 6   K - 1 . This meets the high requirements for thermal management materials. [ABSTRACT FROM AUTHOR]

In this study, a strategy combining grain refinement and nano-inclusion is presented to enhance the thermoelectric figure of merit ( ZT ) of Co 4 Sb 11.5 Te 0.5 . Homogeneously dispersed nano-TiN particles are introduced into the different grain-size skutterudite compounds Co 4 Sb 11.5 Te 0.5 through ball milling and spark plasma sintering. The phase purity, microstructures, and thermoelectric properties of all the samples are characterized. The results prove that the sample consisted of the finest grain (∼220 nm) Co 4 Sb 11.5 Te 0.5 and nano-TiN demonstrates a much lower thermal conductivity of 2.34 Wm −1  K −1 at room temperature and a highest ZT value of 1.07 at 800 K. Furthermore, annealing this sample at 500 °C for 50 h shows minor changes in structure and ZT value, indicating an excellent thermal stability. [ABSTRACT FROM AUTHOR]

An approach of determining thermal conductivity of zeolite is introduced, due to the lack of its thermal properties data for heat transfer calculations in adsorption and catalytic applications. Faujasite (FAU) as one of the important zeolites, whose framework consists of sodalite cages with pores formed by 12-membered rings, was chosen as model zeolite. Pellet-shaped samples made of FAU-type zeolite and binder pseudoboehmite were prepared with different binder fractions and porosities. Apparent thermal conductivity was determined using laser flash method. Results showed that the use of pseudoboehmite increased material’s heat capacity, thermal diffusivity and conductivity, and the apparent thermal conductivity of porous composites decreased with porosity. The thermal conductivity of FAU-type zeolite at 20 °C and 1 atm. was found to be 0.10 W/(m·K) by extrapolating measurement results. [ABSTRACT FROM AUTHOR]

In this paper, Te-doped multifilled n-type skutterudite compounds were prepared by high pressure and high temperature (HPHT) method and characterized by X-ray and SEM, which showed that In x Ba 0.2-x Co 4 Sb 11.5 Te 0.5 samples with fine grain size can be prepared by HPHT rapidly. Both thermal transport properties and electrical transport properties have been characterized in the temperature range of 363–765 K. The combination of (In, Ba) double-filled and Te-doped is more effective than simple Te-doped or the combination of In-filled and Te-doped in reducing lattice thermal conductivity. Finally, the figure of merit value (ZT) of In 0.15 Ba 0.05 Co 4 Sb 11.5 Te 0.5 reached 1.11 at 765 K. This showed that the ZT values of samples can likely be improved through combining multiple filling atoms and doping atoms to broaden the range of resonant phonon scattering. [ABSTRACT FROM AUTHOR]

• Pore structure is key parameter influencing its properties. • The agglomeration of SiO 2 aerogels modified is significantly improved. • The best way is modified by cation, non-ionic and inorganic surfactant. • The strength and thermal conductivity of the sample are 17.16 MPa and 0.1889 W/(m∙K) SiO 2 aerogel and cement-based cementing materials mixed prone to fragmentation, agglomeration, flying and floating, resulting in SiO 2 aerogel in cement-based cementing materials can not be evenly distributed. In addition, the mixture of hydrophobic SiO 2 aerogel and cement-based cementing materials has low adhesion and poor compatibility. In this study, the SiO 2 aerogels were modified in different ways for improved compatibility with inorganic cementing materials. The results show that the SiO 2 aerogel slurry (A4) modified by cation, non-ionic and inorganic surfactant had superior dispersibility in inorganic cementing materials. When the content of A4 was 30 wt%, the dry density, thermal conductivity and compressive strength of the sample were 1136.4 kg/m3, 0.1889 W/(m∙K), and 17.16 MPa, respectively. [ABSTRACT FROM AUTHOR]

• Pressureless sintering with cold/hot isostatic pressing is employed. • Thermal conductivity reached 620 W/mK, which is 57 % higher than that of pure copper. • Hot isostatic pressing is employed to eliminate the closed holes and gaps between diamond and copper. • Open pores in copper skeleton closed post high-temperature pressureless sintering. Diamond/copper composites exhibit excellent thermophysical properties and demonstrate wide potential for heat dissipation applications. However, due to high hardness, it's difficult to process complex shape parts. To overcome the challenge, this study proposes the isostatic pressure technique. A pressureless sintering combined with cold and hot isostatic pressing is employed to prepare shaped diamond/copper composites with thermal conductivity reaching 620 W/mK, which is 57 % higher than that of pure copper. Cold isostatic pressing is used to enhance the density of the skeleton, followed by pressureless sintering to change the pore structure from open hole to closed hole. Finally, hot isostatic pressing is employed to eliminate the closed holes, thus improving the comprehensive performance of the composite. [ABSTRACT FROM AUTHOR]

• Glass foams are made from CRT panel cullet, Mn 3 O 4 , carbon and alkali phosphates. • Pore structures are analyzed by X-ray tomography. • High porosity glass foams are obtained with varying average pore size. • The impact of pore size on the thermal conductivity is discovered. The thermal conductivity (λ) of glass foams is thought to depend on pore size. We report on the impact of pore size, determined using X-ray microtomography, and percentage porosity on the λ of glass foams. Glass foams were prepared by heating powder mixtures of obsolete cathode ray tube (CRT) panel glass, Mn 3 O 4 and carbon as foaming agents, and K 3 PO 4 as additive, to a suitable temperature above T g , and subsequent cooling. Here, we report for the first time a correlation between λ and pore size in the range 0.10–0.16 mm showing a decrease from 57 to 49 mW m−1 K−1 with increasing the pore size for glass foams with porosities of 87–90%. This indicates that the pore structure should be optimized in order to improve the insulating performance of glass foams. [ABSTRACT FROM AUTHOR]

Graphical abstract A distinct core-shell structure comprising polydopamine-coated copper nanowire and nanoparticles was successfully synthesized using a flexible and rapid technique, and incorporated into polyimide matrix for high thermal conductivity and low dielectric constant of the nanocomposite film. Highlights • Polymer nanocomposite with high thermal conductivity and low dielectric constant. • "Point-line" structure with CuNPs@PDA and CuNWs@PDA was successfully synthesized. • Designing nanostructure and surface modification in electronic packaging. • Identification of proper modifier fillers for polymer-matrix nanocomposites. Abstract A multilayer-structured polyimide nanocomposite based on a combination of polydopamine (PDA)-coated copper nanoparticles (CuNPs@PDA) and copper nanowires (CuNWs@PDA) was synthesized using a flexible and rapid method. The maximum thermal conductivity of (CuNPs-CuNWs)@PDA/polyimide (PI) composite with 10 wt% filler loading was increased to 4.13 W/mK, which was an enhancement by nearly 23 times compared with the use of neat PI matrix. The relative permittivity and dielectric loss were about 4.58 and 0.022 at 1 MHz, respectively. The use of multilayer-structure facilitated increased thermal conductivity and reduced permittivity of the nanocomposite compared with CuNPs@PDA/PI and CuNWs@PDA/PI films. The highly thermal conductive nanocomposites are promising for applications in thermal management. [ABSTRACT FROM AUTHOR]

• Observation of enhanced photothermal performance of BNNS-P3HT composite film. • Increased in-plane thermal conductivity of BNNS-P3HT composite film by hot-pressing. • Cytotoxicity test of such composite film shows prospect in photothermal biosystems. This paper presents a study on the impact of π-π stacking interaction on the thermal and photothermal performance of boron nitride nanosheets (BNNS)-conjugated poly(3-hexylthiophene) (P3HT) composite. The composite shows improved thermal conductivity of 4.40 Wm−1K−1 at 30 wt% BNNS loading, which enhances 511 % relative to the pure P3HT film. Furthermore, with the assistance of hot-pressing approach, its thermal conductivity could be increased to 5.19 Wm−1K−1 at the same loading. Additionally, the composite exhibits excellent photothermal property that the surface temperature of BNNS-P3HT can rise to ∼98.3 °C after 120 s under 808 nm laser light irradiation with power density of 1.31 W/cm2. [ABSTRACT FROM AUTHOR]

Graphene-based materials are usually expected to be good thermal conductors. Here, we report on the low thermal diffusivity of free-standing graphene fibers (GFs) fabricated by wet-spinning method. The GF sample mainly consists of freestanding graphene oxide. The radiation effect is excluded by measuring GFs of different lengths. The thermal diffusivity of the suspended GF sample is determined at (2.0–2.08)×10 −6 m 2 s −1 , and the corresponding intrinsic thermal conductivity is 1.14–1.18 W/m K. The low thermal conductivity is mainly attributed to the large thermal contact resistance and very strong phonon scattering at grain boundaries. The finding will be beneficial for thermal design of GF-based thermal energy applications. [ABSTRACT FROM AUTHOR]

A novel silica aerogel/porous Y 2 SiO 5 composite was prepared by freeze casting and sol-gel impregnation. Porous Y 2 SiO 5 ceramics with different solids contents were prepared at 1400 °C. The pore structure, porosity and mechanical properties of the porous Y 2 SiO 5 ceramics before and after impregnating of silica aerogel were investigated. The results show that the room-temperature thermal conductivity decreases and the compressive strength increases remarkably while impregnating porous Y 2 SiO 5 with silica aerogel. The silica aerogel/porous Y 2 SiO 5 composite exhibits a high compressive strength (i.e. 9.3 MPa) and a low thermal conductivity (i.e. 0.260 W/(mK)). This work reports an optimal processing method of silica aerogel/porous Y 2 SiO 5 composite with the potential application as a high-temperature thermal insulation material. [ABSTRACT FROM AUTHOR]

Methyltrimethoxysilane (MTMS) and tetraethoxysilane (TEOS) are used as precursors to synthesize MTMS/TEOS co-precursor aerogels (cp-aerogels) via ambient pressure drying (APD). The effects of NH 3 ·H 2 O concentration on thermal properties of the MTMS/TEOS cp-aerogels were explored in detail. As the NH 3 ·H 2 O concentration increased, the density slightly declined first and then dramatically ascended while the porosity presented an opposite trend. Meanwhile, the cluster size was minished and the pores became more abundant and uniform. These variations induced the changes of the thermal properties of the cp-aerogels. With the NH 3 ·H 2 O concentration increasing, the thermal conductivity approximated linear decrease to 0.027 W m −1 K −1 , the specific heat displayed a logarithmic reduction and the thermal diffusivity retained the similar tendency to the porosity. Furthermore, the thermostability was improved up to 508 °C with the increasing NH 3 ·H 2 O concentration. All these results indicate that the thermal properties of the MTMS/TEOS cp-aerogels can be tailored by adjusting the NH 3 ·H 2 O concentration. [ABSTRACT FROM AUTHOR]

Coal tar pitch was used as raw material for carbon foam. After oxidized and modified, coal tar pitch can be foamed at an atmospheric foaming pressure. Thus, this kind of carbon foam is easy to produce in large scale with low cost. Importantly, owing to the uniform pore structure, high compressive strength and low thermal conductivity, the resultant carbon foam can be used as thermal insulation material applied in energy saving building. A new approach was provided to resolve the large-scale applications of coal tar pitch. [ABSTRACT FROM AUTHOR]

In the study reported in this paper, sulfonated graphite oxide (SGO) was chemically reduced and then incorporated into a polyurethane matrix to produce reduced sulfonated graphite oxide/polyurethane (RSGO/PU) composites. Following reduction, the oxygen-containing functional groups attached to SGO had been effectively removed. The thermally conductive and electrical properties of RSGO/PU composites were thereby enhanced. Percolation thresholds of PU composites filled with RSGO were obtained at loadings below 1 wt%. The RSGO/PU composites exhibited improved gas barrier properties as the loading of RSGO was increased. Based on the fracture morphology investigation, the RSGO was evenly distributed throughout the PU composites and strong filler–matrix interactions were observed. [ABSTRACT FROM AUTHOR]

In this work, we obtained a composite material (h-BN/PPy) show good dispersion stability and photothermal conversion ability in glycol–water. Therefore, the composites can be applied to the photothermal conversion of nanofluids to improve the photothermal conversion efficiency. In addition, we tried to prepare hybrid membrane with photothermal conversion properties. This hybrid membrane present promising applications in desalination field. [Display omitted] • We developed a kind of composites with high photothermal conversion ability. • We loaded more PPy nanoparticles on the surface of h-BN. • The composites can be applied to nanofluids and desalination. The light harvesting capacity and thermal conductivity properties of photothermal materials play a vital role in the photothermal conversion. However, most materials do not possess both of these characteristics simultaneously or efficiently. Here, we design a composite material with both light harvesting capacity and thermal conductivity properties, which polypyrrole is loaded on the surface of boron nitride to form h-BN/PPy composites. The photothermal conversion efficiency can reach 82.84% when the concentration is 0.05 wt%. While combining this composite with PVA-1799 can form a hybrid membrane, which can still exhibits high photothermal conversion performance. [ABSTRACT FROM AUTHOR]

• Phenolic resin aerogel is synthesized from linear and boron phenolic resin. • The ultralow shrinkage attributes to the strong B-O bond in boron phenolic resin. • Thermal conductivity of aerogel with a density of 0.105 g/cm3 is 0.0352 W/(m·K). • Aerogel shows excellent mechanical stability and resilience capacity. Lightweight phenolic resin aerogel with excellent thermal insulation and mechanical properties is an attractive material for thermal engineering applications. However, to synthesize such material, generally, a significant volume shrinkage would occur during the aerogel formation and the processing time is long. To conquer such issues, the lightweight phenolic resin aerogel with excellent thermal insulation and mechanical properties was synthesized by an elaborately designed process, where linear thermoplastic phenolic resin (LPR) and boron-modified thermosetting phenolic resin (BPR) were used as the raw materials. It was found that the shrinkage rate and the processing time of the phenolic resin aerogel were significantly reduced. By optimizing the synthesis process, the aerogel with a density of 0.105 g/cm3 and a thermal conductivity of 0.0352 W/(m·K) was achieved. [ABSTRACT FROM AUTHOR]

[Display omitted] • Hybrid particles are synthesized from boron nitride and barium titanate. • Composite films prepared by incorporating hybrid particles into cyanoethyl cellulose. • The composite exhibits a high dielectric constant of ∼ 44. • High thermal conductivity and breakdown strength are also achieved in the composite. Polymer dielectrics hold a great potential to be used in the field of power equipment and advanced electronics. However, their limited thermal conductivity fails to satisfy the imperative demand for heat dissipation in practical applications. Herein, we report a novel strategy to prepare multifunctional cyanoethyl cellulose matrix composite films by employing a hybrid filler of boron nitride nanosheets and barium titanate nanoparticles. The resultant composite films simultaneously exhibit high thermal conductivity (∼10.54 W/m·K), high dielectric constant (∼44), high electrical breakdown strength (>302 kV/mm), and low dielectric loss (∼0.01). The findings in this work enable broader application of polymer dielectrics in impulse power and energy storage devices. [ABSTRACT FROM AUTHOR]

[Display omitted] • An innovative method is proposed to design and manufacture diamond/Cu composites. • Diamond/Cu composites were fabricated via ultrasonic consolidation and resistance fast diffusion process. • The interfacial configuration of diamond/Cu composites was investigated. In this study, diamond/Cu composites were fabricated using ultrasonic consolidation and resistance rapid diffusion technology with Cr addition to improve the wettability between diamond and Cu martix, the interfacial configuration and thermal conductivity of diamond/Cu composites were also investigated. Excellent interfacial bonding between diamond and Cu matrix was achieved by surface metallization of diamond with Cr, and the formation of subgrain boundaries was observed in the Cr 7 C 3 and Cu matrix grains near the interface. The thermal conductivity of the composite prepared by this process reaches 421.314 W/m·K when diamond added mass at 1.34%, which is 12% higher than that of the Cu matrix. [ABSTRACT FROM AUTHOR]

A new kind of thermally-conductive polymer nanocomposite was produced by reinforcing the typical polybenzoxazine matrix P(BA-a) with silane-treated Si 3 N 4 nanoparticles using a compression molding technique. By adding 0 to 70% nano-Si 3 N 4 , the nanocomposite׳s thermal conductivity was enhanced from 0.18 to 5.78 W/m K. Based on the analyzed morphology, the Si 3 N 4 nanoparticles tend to form continuous conductive chains within the polybenzoxazine matrix, which are responsible for the improved thermal conductivity of the polybenzoxazine resin. Also, these new nanocomposites exhibited improved dielectric, coefficient of thermal expansion, and flexural properties. The thermal stability of these materials significantly improved upon the addition of the nano-Si 3 N 4 fillers. Their unique thermal and dielectric properties make them suitable for microelectronic packaging applications. [ABSTRACT FROM AUTHOR]

• The thermal conductivity of as-obtained composite is 542.66 W/m·K. • Reinforcements are modified with copper layers by chemical plating process. • The sandwich structure contribute to improving thermal conductivity. The continuous copper thermal-diffusion network of graphite flakes (GFs), aluminum sheets (Als), and Al particles (Alp) was prepared via chemical plating methods. After the vacuum-pressure infiltration process, Cu coatings contacted with other components forming three dimensional thermal diffusion pathways. The prepared Als@Cu/Alp@Cu/GFs@Cu/Al composites exhibited high effective thermal transfer properties. Moreover, the thermal conductivity (TC) of the Als@Cu-2/Alp@Cu/GFs@Cu/Al composite showed the optimal value of 542.66 W/m·K, which was larger than the pure Al matrix about 2.30 times. In this study, the innovative preparation method could be applied to fabricate aluminum-based composites with better thermal diffusion performance. [ABSTRACT FROM AUTHOR]

• A novel thermal conductivity polymer (GP 6) was mass-produced. • The GP 6 could be one-step, reducing the cost and carbon emission. • Some applications of GP 6 were exhibited in this paper. In this study, graphene was mass-produced from graphite through ultrasonic-assisted exfoliation in N-methyl-2-pyrrooxone (NMP) and then mixed with polyamides Nylon (PA6) to obtain a high thermal conductivity engineering polymer (GP6). The thermal conductivity of GP6 is 30 W m−1 K−1 and the density is 1.8 g cm−1. GP6 could be used in heat dissipation systems of LED lamps and cameras with injection molding at 260 °C, thus cutting the cost by 30% and reducing the carbon emission. [ABSTRACT FROM AUTHOR]

Chitosan, as a low-price and eco-friendly raw material, was used to synthesize a graphene-based carbon aerogel (CA). Afterwards, 1-hexadecanol was infiltrated into CA to prepare a form-stable phase change material (PCM) for thermal energy storage. The morphologies and thermal properties of samples were analyzed. Even at 70 °C, the form-stable PCM still retains form stability without any leakage. TGA results reveal a remarkable absorption capacity of CA, which can hold up to 50 times its weight in 1-hexadecanol. A thermal conductivity enhancement of 107.9% along x-y direction of CA was achieved at the loading of nearly 2 wt%, while that in z direction is less remarkable. DSC results show excellent thermal stability of the form-stable PCM with a satisfactory latent heat capacity of around 220 kJ/kg. [ABSTRACT FROM AUTHOR]

Lightening thermal insulation system is significantly crucial for the high-cost aerospace field. This paper prepared novel thermal insulation composites, N-doped graphene aerogels reinforced by ultrafine quartz fibers. The density is only 0.072 g/cm 3 , and the thermal conductivity measured by Hot disk apparatus is 0.0327 W/(m K). Meanwhile, with reinforced by ultrafine quartz fibers, the tensile strength of the composites reaches 3.61 MPa. The ultralow density, low thermal conductivity and high strength make the composites potentially useful thermal insulation materials in the aerospace field. [ABSTRACT FROM AUTHOR]

Abstract: Capric–myristic–palmitic acid ternary eutectic mixture (CA–MA–PA) was prepared as phase change material (PCM). A novel composite PCM of CA–MA–PA/expanded graphite (EG) with an optimum mass ratio (CA–MA–PA:EG=13:1) was prepared by uniformly absorbing CA–MA–PA into the porous network structure of the EG. The melting and freezing temperatures of CA–MA–PA/EG composite PCM were measured by differential scanning calorimeter as 18.61°C and 16.58°C, respectively, while the melting and freezing latent heats were 128.2J/g and 124.5J/g, respectively. The thermal conductivity of the CA–MA–PA/EG composite PCM was measured as 3.67W/mK and thus the thermal storage and release rates were significantly increased. The thermal cycling test results showed that CA–MA–PA/EG composite PCM has a good thermal reliability. All the above results show that the CA–MA–PA/EG composite PCM is a potential solution for latent heat storage system. [Copyright &y& Elsevier]

Abstract: We studied the mechanism and morphological evolution of a thermal interface material prepared by pressureless sintering of a paste containing silver nanoparticles (Ag NPs) flocculated with citrate or nitrate. A high thermal conductivity (>100W/K-m) was obtained from the material sintered at 453K for 30min. Significant crystallization and large amounts of twins were observed in the material. These results could be ascribed to the thinner organic shells surrounded the Ag NPs, resulting in easy activation of Ostwald ripening. [Copyright &y& Elsevier]

• Tensile properties were greatly influenced by the fraction of the secondary phase. • New Al 5 Cu 2 Mg 8 Si 6 and Al 7 Cu 2 M phases formed due to addition of Cu in Al-Si- x Fe-Mg- y Cu-Mn alloy. • Complex shape of β-AlFeSi phase lead to enhance mechanical properties of S-3 alloys. • Thermal conductivity was found to be directly proportional to the fraction of the α-Al phase. • S-3 alloys showed superior mechanical and thermal properties as compared to other Al alloys. In the present study, effect of secondary phase on mechanical property and thermal conductivity of newly developed high-pressure die-cast Al-6Si-0.3Fe-1.5 Mg(S-1), Al-6.5Si-0.4Fe-1.6 Mg-0.7Cu-0.08Mn(S-2), and Al-8Si-0.5Fe-0.5 Mg-1.5Cu-0.10Mn-0.1Ni(S-3) alloys were investigated. The fraction of α-Al phase and secondary phase has been predicted by thermodynamic simulations. UTS was found to be 307 MPa, 331 MPa and 350 MPa for S-1 ∼ 3 alloys. The thermal conductivities values are 160.3 W/mK, 153.0 W/mK, and 146.0 W/mK for S-1 ∼ 3 alloys. The S-3 alloy has the highest fraction of the secondary phases and as a result of the addition of Fe and Cu is partially precipitated into the Al 5 Cu 2 Mg 8 Si 6 , Al 7 Cu 2 M and β-AlFeSi phases. The mechanical properties of these alloys were found to be directly proportional to the fraction of Si addition as well as secondary phases, whereas thermal conductivity shows the opposite trend. Newly developed S-3 alloys in the present study showed excellent mechanical and thermal conductivity as compared to other Al alloys reported in the literature. [ABSTRACT FROM AUTHOR]

[Display omitted] • The influence of coating method of graphene on thermal conductivity fabric was investigated. • The thermal conductivity and thermal protection property were tested which method was small molten metal splash. • Graphene coating could reduce the temperature rise of the fabric about 30% from 27 °C to 19 °C. • SEM images of graphene-coated fabric showed that most graphene is distributed within 50 μm of the fabric surface. Blade coating and screen printing methods were used to prepare graphene-modified fabric to study their thermal conductivity and molten metal splashes heating properties in our research. The effect of the coating method on thermal properties was discussed. The fabric with blade coating had lower penetration depth, the in-plane and cross-plane thermal conductivity reached 2.08 W/(m·K) and 0.48 W/(m·K) which meant the anisotropy value was 4.3 while the control fabric was 2.4. The elevated temperature after impacting of molten metal splashes declined about 30% from 27 °C to 19 °C. About screen printing samples, the in-plane to cross-plane ratio of thermal conductivity was 3.5, and the temperature rise was 25 °C. [ABSTRACT FROM AUTHOR]