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41 results on '"Hu, Huanlong"'

26. Thermoelectric Performance: Enhancement of Thermoelectric Performance in CuSbSe 2 Nanoplate‐Based Pellets by Texture Engineering and Carrier Concentration Optimization (Small 50/2018)

Author

Luo, Yubo, primary, Du, Chengfeng, additional, Liang, Qinghua, additional, Zheng, Yun, additional, Zhu, Beibei, additional, Hu, Huanlong, additional, Khor, Khiam Aik, additional, Xu, Jianwei, additional, Yan, Qingyu, additional, and Kanatzidis, Mercouri G., additional

Published
2018
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28. In vitro biological properties of 45S5 bioglass fabricated by spark plasma sintering (SPS)

Author

Li Zhong, Hu Huanlong, Thompson Brianna, and Khor Khiam Aik

Subjects
Histology, Materials science, Biomedical Engineering, Spark plasma sintering, Bioengineering, 030206 dentistry, 02 engineering and technology, 021001 nanoscience & nanotechnology, In vitro, 03 medical and health sciences, 0302 clinical medicine, Chemical engineering, Biological property, 0210 nano-technology, Biotechnology
Published
2016

39. Correlation between properties and microstructure of laser sintered porous β-tricalcium phosphate bone scaffolds.

Author

Shuai, Cijun, Feng, Pei, Zhang, Liyang, Gao, Chengde, Hu, Huanlong, Peng, Shuping, and Min, Anjie

Subjects
LASER sintering, PHOSPHATES, SCANNING electron microscopes, BIOCOMPATIBILITY, MESENCHYMAL stem cells
Abstract

A porous β-tricalcium phosphate (β-TCP) bioceramic scaffold was successfully prepared with our homemade selective laser sintering system. Microstructure observation by a scanning electron microscope showed that the grains grew from 0.21 to 1.32 μm with the decrease of laser scanning speed from 250 to 50 mm min−1. The mechanical properties increased mainly due to the improved apparent density when the laser scanning speed decreased to 150 mm min−1. When the scanning speed was further decreased, the grain size became larger and the mechanical properties severely decreased. The highest Vickers hardness and fracture toughness of the scaffold were 3.59 GPa and 1.16 MPa m1/2, respectively, when laser power was 11 W, spot size was 1 mm in diameter, layer thickness was 0.1–0.2 mm and laser scanning speed was 150 mm min−1. The biocompatibility of these scaffolds was assessed in vitro with MG63 osteoblast-like cells and human bone marrow mesenchymal stem cells. The results showed that all the prepared scaffolds are suitable for cell attachment and differentiation. Moreover, the smaller the grain size, the better the cell biocompatibility. The porous scaffold with a grain size of 0.71 μm was immersed in a simulated body fluid for different days to assess the bioactivity. The surface of the scaffold was covered by a bone-like apatite layer, which indicated that the β-TCP scaffold possesses good bioactivity. These discoveries demonstrated the evolution rule between grain microstructure and the properties that give a useful reference for the fabrication of β-TCP bone scaffolds. [ABSTRACT FROM AUTHOR]

Published
2013
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41. Enhancement of Thermoelectric Performance in CuSbSe 2 Nanoplate-Based Pellets by Texture Engineering and Carrier Concentration Optimization.

Author

Luo Y, Du C, Liang Q, Zheng Y, Zhu B, Hu H, Khor KA, Xu J, Yan Q, and Kanatzidis MG

Abstract

This work reports the thermoelectric properties of the CuSbSe 2 -x mol% PtTe 2 (x = 0, 0.5, 1.0, 1.5, and 2.0) pellets composed of highly oriented single crystalline nanoplates. CuSbSe 2 -PtTe 2 single crystalline nanoplates are prepared by a wet-chemical process, and the pellets are prepared through a bottom-up self-assembly of the CuSbSe 2 -PtTe 2 nanoplates and spark plasma sintering (SPS) process. X-ray diffraction and field emission scanning electron microscopic analyses show a highly textured nature with an orientation factor of ≈0.8 for (00l) facets along the primary surface of the pellets (in-plane, perpendicular to the SPS pressure). By this way, bulk-single-crystal-like electrical and thermal transport properties with a strong anisotropy are obtained, which results in an effective optimization on thermoelectric performance. The maximum in-plane thermoelectric figure-of-merit ZT value reaches 0.50 at 673 K for CuSbSe 2 -2.0 mol% PtTe 2 pellet, which is about five times higher than the in-plane ZT (0.10) for pure CuSbSe 2 ., (© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)

Published
2018
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