Rapid synthesis and enhanced thermoelectric properties of Ba8Cu6Ge8xSi40-8x (x = 0, 1, 2, 3) alloys prepared using high-temperature, high-pressure method

被引：0

作者：

Sun, Bing ^{[1
]}

Jia, Xiaopeng ^{[1
]}

Huo, Dexuan ^{[2
]}

Sun, Hairui ^{[1
]}

Zhang, Yuewen ^{[1
]}

Liu, Binwu ^{[1
]}

Liu, Haiqiang ^{[1
]}

Kong, Lingjiao ^{[1
]}

Liu, Baomin ^{[1
]}

Ma, Hongan ^{[1
]}

机构：

[1] National Key Lab of Superhard Materials, Jilin University, Changchun,130012, China

[2] Institute of Materials Physics, Hangzhou Dianzi University, Hangzhou,310018, China

来源：

Journal of Alloys and Compounds | 2016年 / 681卷

关键词：

Alloys - Hydrates - Thermoelectric equipment - Thermoelectricity;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Clathrate compounds of Ba8Cu6Ge8xSi40-8x (x = 0, 1, 2, 3) were synthesized using a high-temperature, high-pressure (HPHT) method. The study explored chemical doping with Ge at the Si site to optimize the thermoelectric figure of merit in a series of Ba8Cu6Ge8xSi40-8x alloys. The synthesis time was significantly reduced from a few days to 30 min, and the electrical resistivities, Seebeck coefficients and thermal conductivities of the samples were measured in the temperature range of 303-773 K. Among all of the samples, the sample with x = 3 showed the lowest thermal conductivity of 0.91 W m-1 K-1 at 573 K and the maximum the dimensionless figure of merit (ZT) value of 0.42 at 673 K. Combining elemental substitution and HPHT effectively improved the thermoelectric properties of clathrates. © 2016 Elsevier B.V. All rights reserved.

引用

页码：374 / 378

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