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

doi:10.13251/j.issn.0254-6051.2022.03.041

Heat Treatment of Metals ›› 2022, Vol. 47 ›› Issue (3): 222-226.DOI: 10.13251/j.issn.0254-6051.2022.03.041

• NUMERICAL SIMULATION • Previous Articles Next Articles

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

Chen Jing^1,2, Wang Gao^1,2, Liang Haijian³, Li Zhiling^1,2, Liu Yi⁴, Zhang Jiankang⁴

1. School of Information and Communications Engineering, North University of China, Taiyuan Shanxi 030051, China;
2. National Key Laboratory for Electronic Measurement Technology, North University of China, Taiyuan Shanxi 030051, China;
3. Department of Electronic Engineering, Taiyuan Institute of Technology, Taiyuan Shanxi 030051, China;
4. Kunming Institute of Precious Metals, Kunming Yunnan 650106, China

Received:2021-11-15 Revised:2022-01-19 Online:2022-03-25 Published:2022-04-22

Abstract

Abstract: 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 2.7 μV/℃ and 5.6 μV/℃, respectively. It is expected that the firstprinciples calculation and analysis will be applied to the selection of the thermal electrode materials.

Key words: iridium-rhodium alloy, first principles, thermocouple, thermoelectric properties

CLC Number:

TB31

Chen Jing, Wang Gao, Liang Haijian, Li Zhiling, Liu Yi, Zhang Jiankang. Micro- and thermoelectric properties of iridium and iridium-rhodium alloys[J]. Heat Treatment of Metals, 2022, 47(3): 222-226.

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

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