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EN10.08.11 : Thermoelectric Performance of Cu2(Te1-x,Sex) Synthesized via Powder Metallurgy Method

5:00 PM–7:00 PM Apr 4, 2018

PCC North, 300 Level, Exhibit Hall C-E

Description
Yuchong Qiu1 Ying Liu1 Jinwen Ye1 Lixian Lian1 Jun Li1

1, College of Materials Science and Engineering, Sichuan University, Chengdu, , China

Cu2(Te1-x,Sex) bulks with x = 0, 0.1, 0.3, 0.5, 0.7, 0.9 and 1.0 were prepared via powder metallurgy method, including high energy ball milling, cold compacting and inert gas annealing. The entire process was shortened to <20 hours compared to the traditional method which might cost several days. The results showed that Cu2(Te0.9,Se0.1) inherited the four phase transitions of Cu2Te from room temperature up to 800 K. When x=0.1, the introduced Se would cause the formation of Se containing nano-scale particles covering Se free matrix, remarkably suppressing the thermal conductivity of the material. An enhanced ZT of ~0.9 at 1000 K could be obtained in Cu2(Te0.9,Se0.1) bulks.

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