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SiC composite ceramics for solar absorber and storage integration are new concentrating solar power materials. SiC composite ceramics for solar absorber and storage integration were fabricated using SiC, black corundum and kaolin as the raw materials, Co2O3 as the additive via pressureless graphite-buried sintering method in this study. Influences of Co2O3 on the microstructure and properties of SiC composite ceramics for solar absorber and storage integration were studied. The results indicate that sample D2 (5wt% Co2O3) sintered at 1 480 °C exhibits optimal performances for 119.91 MPa bending strength, 93% solar absorption, 981.5 kJ/kg (25–800 °C) thermal storage density. The weight gain ratio is 12.58 mg/cm2 after 100 h oxidation at 1 000 °C. The Co2O3 can decrease the liquid phase formation temperature and reduce the viscosity of liquid phase during sintering. The liquid with low viscosity not only promotes the elimination of pores to achieve densification, but also increases bending strength, solar absorption, thermal storage density and oxidation resistance. A dense SiO2 layer was formed on the surface of SiC after 100 h oxidation at 1 000 °C, which protects the sample from further oxidation. However, excessive Co2O3 will make the microstructure loose, which is disadvantageous to the performances of samples. [ABSTRACT FROM AUTHOR]

In order to study the performance and feasibility of magnesia‐alumina spinel (MgAl2O4) ceramics for thermal storage in solar thermal power generation, MgAl2O4 was prepared by theoretical composition using α‐Al2O3 as aluminium source, fused magnesia, magnesite, and light burned magnesia as different magnesium sources and kaolin as additive. The effects of magnesium source and the additive on sintering properties, thermal shock resistance and thermal properties of MgAl2O4 ceramics were researched. The results shown sample A1 (with fused magnesia) sintered at 1670°C possessed the optimum comprehensive properties, the bending strength increased by 7.71% after 30 thermal shock times (room temperature‐1000°C, air cooling), the specific heat capacity was 1.05 J/ (g·K). Therefore, the MgAl2O4 ceramics exhibited great potential in high‐temperature thermal storage material. [ABSTRACT FROM AUTHOR]

Selecting suitable ceramic powders for the preparation of UV‐curable ceramic suspensions, which are well suited for printing processes and production of high‐performance ceramic components, is a crucial factor in the practical industrial application of digital light processing (DLP) stereolithography. Therefore, this study aims to provide a comprehensive evaluation of alumina ceramic parts fabricated via DLP stereolithography using a variety of alumina powders with varying sizes and morphologies. Experiments were conducted to examine the rheological response, recoating performance, and curing behavior of UV‐curable alumina suspensions. Additionally, the thermal decomposition behavior of three‐dimensional (3D)‐printed green‐bodies, as well as the physical and mechanical properties of 3D‐printed sintered alumina components were thoroughly investigated. The best physical and mechanical performances were achieved by printing 55 vol% suspensions prepared using near‐spherical AA04 alumina powders (median diameter.4 μm). This study elucidates the effects of ceramic particle size and morphology on the entire technological process of DLP‐based ceramic stereolithography, thereby establishing the guidelines for the fabrication of high‐performance 3D‐printed ceramic objects in industrial and engineering production by selecting appropriate ceramic powders. [ABSTRACT FROM AUTHOR]