In this study, the dense bulk Cu2Se thermoelectric (TE) materials were prepared by microwave melting and hot pressing sintering. The effects of different cooling processes on the microstructure and TE properties of Cu2Se were investigated. The results showed that the Cu2Se TE material prepared by microwave synthesis had high electrical conductivity, which was about 105 S⋅m[Formula: see text]. The annealing process can lead to grain growth of Cu2Se and the formation of micropores in the Cu2Se, which deteriorated the thermal conductivity. The Cu2Se material prepared by the microwave melting and slow cooling process had the best TE performance, and the ZT value can reach 0.68 at 700 K.

中文翻译：

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微波快速合成高导电性 Cu2Se 热电材料

在这项研究中，致密的块状铜2通过微波熔融和热压烧结制备硒热电（TE）材料。不同冷却工艺对Cu显微组织和热电性能的影响2硒进行了调查。结果表明，Cu2微波合成制备的 Se TE 材料具有较高的电导率，约为 105S⋅m[公式：见正文]。退火过程会导致铜的晶粒长大2Se和Cu中微孔的形成2Se 会降低导热性。铜2微波熔化缓冷工艺制备的Se材料的TE性能最好，700 K时ZT值可达0.68。