Thermoelectric Properties of Bi0.5Sb1.5Te3 Prepared by the Ultrarapid Quenching Process
P-type Bi0.5Sb1.5Te3 thermoelectric materials have been prepared by ultrarapid quenching method with various cooling rates. The microstructures of sample are very different from those prepared by normal cooling. The ultrarapid quenched material was obtained in the shape of foils, the thickness of which were found to vary in the range of 6-20 μm, which corresponds to a cooling rate of about 106 K/S. X-ray diffraction evidenced a microcrystalline structure of the expected composition with a (0015) plane. Increasing the cooling rate, the Seebeck coefficient increase, the electrical conductivity decrease and the power factor rise up to 4.4×10-3 Wm-1K-2 .The highest ZT value of 1.22 was achieved for the materials with the copper roller roration speed 40 m/s in room temperarure.
Ultrarapid Quenching Thermoelectric Materials Bi0.5Sb1.5Te3 Spark Plasma Sintering
Shaohong WEI Hui CHEN Zhong WANG Ying CHU Lei ZHU Xuyu JIAN Haijun YU
Energy Materials and Technology Research Institute,General Research Institute for Nonferrous Metals, Beijing 100088, China
国际会议
重庆
英文
394-398
2008-06-09（万方平台首次上网日期，不代表论文的发表时间）