A Thermoelectric Zintl Phase Na2+xGa2+xSn4-x with Disordered Na Atoms in Helical Tunnels

被引：26

作者：

Yamada, Takahiro ^{[1
]}

Yamane, Hisanori ^{[1
]}

Nagai, Hideaki ^{[2
]}

机构：

[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

[2] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058565, Japan

来源：

ADVANCED MATERIALS | 2015年 / 27卷 / 32期

关键词：

crystal structures; rattling; thermoelectric materials; Zintl phase; THERMAL-CONDUCTIVITY; CRYSTAL; COMPOUND;

D O I：

10.1002/adma.201501970

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A polycrystalline sample of Na2+xGa2+xSn4-x with x = 0.19 has low thermal conductivities of 0.56 and 0.58 W m-1 K-1 due to static and dynamic positional disorder of Na atoms in the crystal structure and dimensionless figures of merit (ZT values) values of 0.98 and 1.28 at 295 and 340 K, respectively. The performance is comparable to those of commercial Bi2Te3-based materials. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：4708 / 4713

页数：6

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