西华大学学报（自然科学版）2018，Vol.37Issue(3)：68-72,5.DOI:10.3969/j.issn.1673-159X.2018.03.010
Half-Heusler合金TaCoSb的制备及Sn掺杂对其热电性能的影响
The Preparation of Half-Heusler Alloy TaCoSb and the Influence of Sn Doping on the Thermoelectric Properties
摘要
Abstract
In this paper,high melting point Half-Heusler alloy TaCoSb has been successfully prepared by powder sintering,high energy ball milling and DC rapid hot press process. The thermoelectric properties show that TaCoSb is a n-type thermoelectric material and σ=0.58×105S·m-1,κ=3.8 W·m-1K-1,S = -110 μV·K-1,ZT=0.18 in 973K,respectively. This paper also researches the effect of Sn doping in Sb site on the thermoelectric properties of TaCoSb. We find that Sn doping has reduced the thermal conductivity and electrical conductivity of the material, the Seebeck coefficient slightly increases and the power factor decreases. Finally,the value of ZT doesn't significantly in-crease. Because of the low room temperature conductivity of TaCoSb, we should select the doping element in the Sb right side.关键词
Half-Heusler合金/TaCoSb/热电性能/粉末烧结/Sn掺杂Key words
Half-Heusler alloy/TaCoSb/thermoelectric properties/powder sintering/Sn doping分类
通用工业技术引用本文复制引用
王浚臣,袁国才,禹劲秋,莫小波,金应荣,黄丽宏..Half-Heusler合金TaCoSb的制备及Sn掺杂对其热电性能的影响[J].西华大学学报（自然科学版）,2018,37(3):68-72,5.基金项目
特种材料及制备技术省高校重点实验室(西华大学)开放课题(SZJJ2016-034) （西华大学）
流体及动力机械教育部重点实验室(西华大学)开放课题(SZJJ2017-082). （西华大学）
