材料科学与工程学报2013，Vol.31Issue(2)：204-207,4.
Ag/Sb比对(GeTe)85(AgySb2-yTe3-y)15合金热电性能的影响
Effect of Ag/Sb Ratio on the Thermoelectric Properties of (GeTe) 85 (AgySb2-yTe3-y)15 TAGS Alloys
摘要
Abstract
(GeTe)85(AgySb2-yTe3-y)15(y=1. 0,1. 02,1. 2,1. 3,1. 5) TAGS alloys with different Ag/Sb ratio were synthesized and Ag8 GeTe6 with low thermal conductivity as the second phase was found in non-stoichiometric samples. The lattice thermal conductivity could be greatly decreased by changing the Ag/Sb ratio and the value was as low as 0. 2Wm-1' K-1 for the sample with y=1. 3 at 700K. However, the electrical conductivity of the samples increased first and then decreased, while the Seebeck coefficient behaved inversely, as the Ag/Sb ratio increased. The maximum ZT value of about 1. 37 was obtained at 744K for the sample with y=1. 02, which increased about 10% compared with that of the stoichiometric one.关键词
热电材料/TAGS/热导率/电导率Key words
thermoelectric materials/ TAGS/ thermal conductivity/ electrical conductivity分类
数理科学引用本文复制引用
金吉,朱铁军,刘晓华,赵新兵..Ag/Sb比对(GeTe)85(AgySb2-yTe3-y)15合金热电性能的影响[J].材料科学与工程学报,2013,31(2):204-207,4.基金项目
国家自然科学基金资助项目(50971115),浙江省科技厅基金资助项目(2009C34007) （50971115）
