Thermoelectric and structural properties of high-performance In-based skutterudites for high-temperature energy recovery
Thermoelectric and structural properties of high-performance In-based skutterudites for high-temperature energy recovery
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DOI：
10.1557/jmr.2011.163
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发表时间：
2011-08
影响因子：
2.7
通讯作者：
Krishnendu Biswas;M. Good;Kamandi C. Roberts;M. Subramanian;T. Hendricks
中科院分区：
文献类型：
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作者：
Krishnendu Biswas;M. Good;Kamandi C. Roberts;M. Subramanian;T. Hendricks
The temperature-dependent thermoelectric (TE) and structural properties of n-type filled skutterudites were measured from 300–625 K. In_0.2Co_4Sb_12, and In_0.2Ce_0.05Yb_0.1Co_4Sb_12 exhibited figure of merit (ZT) values as high as 1.2 at 625 K and In_0.2Ce_0.15Co_4Sb_12 showed ZT values of ∼1.4 at 625 K. The room temperature Young’s modulus, Poisson’s ratio, and coefficient of thermal expansion (at 298–673 K) of In_0.2Ce_0.15Co_4Sb_12, In_0.2Co_4Sb_12, and In_0.2Ce_0.05Yb_0.1Co_4Sb_12 compositions were found to be lower than that for the unfilled Co_4Sb_12 skutterudite material. It was discovered that thermal cycling of n-type In_0.15Ce_0.1Co_4Sb_12 and In_0.2Ce_0.17Co_4Sb_12 materials from 323–673 K (200 cycles) actually increased their power factors by 13.6–36% at 510–525 K without appreciably changing the Young’s modulus or the Poisson’s ratio. The transport and structural properties characterized in this work are critical to transitioning these materials into operating TE devices and systems.
