Synthesis and thermoelectric properties of the quaternary type-I Si clathrates K_8-δGa_xAl_ySi_46-x-y

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• 作者：Shiva Kumar Singh ; Yukihiro Isoda ; Motoharu Imai ; ^{IMAI.Motoharu@nims.go.jp}
• 关键词：Intermetallic ; Electrical properties ; Thermoelectric properties
• 刊名：Intermetallics
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：82
• 期：Complete
• 页码：93-100
• 全文大小：958 K
• 卷排序：82

文摘

Al substitution for Ga in the ternary Si clathrate K8Ga8Si38 was investigated. The Si clathrates K8-δGaxAlySi46-x-y (x + y ≈ 8; 0 ≤ y < 8) were synthesized. Al substitution significantly changed the transport properties of K8Ga8Si38. Al substitution increased the thermoelectric figure of merit by a factor of six.