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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Microstructure and properties of p-type (Bi0.25Sb0.75)2Te3 fabricated by
spark plasma sintering
WANG Fu-qiang(王富强), CHEN Hui(陈 晖), WANG Zhong(王 忠), CHENG Yan(成 艳),
CHU Ying(褚 颖), ZHU Lei(朱 磊), JIAN Xu-yu(简旭宇)

Energy Materials and Technology Research Institute,
General Research Institute for Nonferrous Metals, Beijing 100088, China

Abstract:P-type thermoelectric material (Bi0.25Sb0.75)2Te3 was sintered by spark plasma sintering(SPS) process in the temperature range of 320−420 ℃. The microstructures of sintered materials were found to be well aligned, particularly when sintered at lower sintering temperatures. The electrical conductivity of the material became larger as the sintering temperature increased. The Seebeck coefficient showed a general decreasing tendency with an increase in sintering temperature. In terms of the power factor, the optimum sintering temperature was found to be 380 ℃ for a maximum value of around 2.6 mW/K.

 

Key words: (Bi0.25Sb0.75)2Te3; thermoelectric material; spark plasma sintering(SPS); sintering temperature

ISSN 1672-7029
CN 43-1423/U

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