| THE 20TH NATIONAL HIGH-TECH CERAMICS ANNUAL CONFERENCE |
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| Effect of Mixing Mode on Thermoelectric Properties of Cu2Se Synthesized by Combustion |
| LI Jiaqi1,2, LIU Guanghua3, WU Xiaoming1,2, HE Gang1, YANG Zengchao1, LI Jiangtao1
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1 Cryogenic Engineering Key Laboratory, Institute of Physics and Chemistry, Chinese Academy of Science, Beijing 100190
2 College of Material and Optoelectronic Technology,University of Chinese Academy of Science,Beijing 100190
3 College of Material Science, Tsinghua University, Beijing 100084 |
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Abstract In this work, Cu and Se were mixed in a mixture ratio of 2:1 (molar ratio) by simple mixing, grinding in quartz mortar, planetary ball milling and high energy vibration milling. The results of SEM showed that the powder had poor uniformity and large particles size after simple mixing and grinding in quartz mortar. In opposite, the particle size of the powder after mixture of planetary mixture and high-energy vibrating milling was small and uniform, while generated the CuSe phase. Cu2Se with residual small amount of Cu phase was synthesized by self-propagating combustion, then the bulk was densified by SPS and a small amount of Cu phase also converted into Cu2Se. The conductivity performance and the thermal conductivity of sample after the ball milling for 2 h and the high-energy ball mill mixture for 10 min are lower than that of the simple mixture and mortar mixture. Also the thermoelectric performance of the product after milling in planetary and high energy vibration was excellent. The ZT value of the combustion synthesised Cu2Se after high-energy vibrating ball milling reached 1.25 at 550 ℃.
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Published: 31 July 2019
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| Fund:This work was financially supported by the National Natural Science Foundation of China (51672285, 51327804). |
About author:: Jiaqi Listudied at the Technical Institute of Physics and Chemistry from September 2016, and is committed to the research of the preparation and performance of metal selenide thermoelectric materials.
Guanghua Liu, graduated from Tsinghua University in 2007,is mainly engaged in the research of new techno-logy and structure-performance relationship of advanced ceramic materials. |
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2019, Vol. 33 
