铱及铱铑合金微观特性和热电特性  

Micro-and thermoelectric properties of iridium and iridium-rhodium alloys

作　　者：陈靖 王高[1,2] 梁海坚 李志玲 刘毅[4] 张健康[4] Chen Jing;Wang Gao;Liang Haijian;Li Zhiling;Liu Yi;Zhang Jiankang(School of Information and Communications Engineering,North University of China,Taiyuan Shanxi 030051,China;National Key Laboratory for Electronic Measurement Technology,North University of China,Taiyuan Shanxi 030051,China;Department of Electronic Engineering,Taiyuan Institute of Technology,Taiyuan Shanxi 030051,China;Kunming Institute of Precious Metals,Kunming Yunnan 650106,China)

机构地区：[1]中北大学信息与通信工程学院,山西太原030051 [2]中北大学电子测试技术国家重点实验室,山西太原030051 [3]太原工业学院电子工程系,山西太原030051 [4]昆明贵金属研究所,云南昆明650106

出　　处：《金属热处理》2022年第3期222-227,共6页Heat Treatment of Metals

基　　金：山西省自然科学基金(自由探索)(20210302124541)。

摘　　要：基于第一性原理计算研究了热电极铱和铱铑合金的能带结构和态密度。采用虚拟晶体近似方法建立了铱铑合金模型,通过搭建的试验平台测试了IrRh10-Ir热电偶和IrRh40-Ir热电偶的热电性能。结果表明,计算出的纯金属铱和铑的晶格常数与试验参数符合较好,铱铑合金具有良好的导体性能和结构稳定性。IrRh10-Ir热电偶和IrRh40-Ir热电偶具有良好的线性特性,灵敏度分别为2.7、5.6μV/℃。有望将第一性原理计算分析应用于热电极材料的选择上。Based on first-principles calculations,the band structure and density of states of the thermal electrode iridium and iridium-rhodium alloys were investigated.A model of iridium-rhodium alloy was established by virtual crystal approximation(VCA).The thermoelectric properties of IrRh10-Ir thermocouple and IrRh40-Ir thermocouple were tested by the test platform.The results show that the calculated lattice constants of pure metals iridium and rhodium are in good agreement with the test parameters,and the iridium-rhodium alloy has good conductor properties and structural stability.The IrRh10-Ir thermocouple and IrRh40-Ir thermocouple have good linearity characteristics,and the sensitivity is 2.7μV/℃ and 5.6μV/℃,respectively.It is expected that the firstprinciples calculation and analysis will be applied to the selection of the thermal electrode materials.

关 键 词：铱铑合金 第一性原理 热电偶 热电性能 

分 类 号：TB31[一般工业技术—材料科学与工程]