Effect of Ru Substitution for Mn in the Si2Ti-Type Al-Mn-Si Alloy

被引：6

作者：

Yamamoto, Akio ^{[1
]}

Takeuchi, Tsunehiro ^{[1
,2
,3
]}

机构：

[1] Nagoya Univ, Dept Crystalline Mat Sci, Nagoya, Aichi 4648603, Japan

[2] Nagoya Univ, EcoTopia Sci Inst, Nagoya, Aichi 4648603, Japan

[3] Japan Sci & Technol Agcy, PRESTO, Tokyo 1020076, Japan

来源：

JOURNAL OF ELECTRONIC MATERIALS | 2012年 / 41卷 / 06期

关键词：

Thermoelectric material; Seebeck coefficient; electrical resistivity; thermal conductivity; lattice thermal conductivity; dimensionless figure of merit; THERMOELECTRIC PROPERTIES; ELECTRONIC-STRUCTURE; COMPOUNDS AL2RU;

D O I：

10.1007/s11664-012-2101-y

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The Al-Mn-Si C54-phase is characterized by a large magnitude of the Seebeck coefficient || exceeding 300 V/K. It also possesses large lattice thermal conductivity, and hence the magnitude of the dimensionless figure of merit is limited to small values less than 0.1. To decrease the lattice thermal conductivity, we partially substituted heavier Ru for lighter Mn in the Al-Mn-Si C54-phase. Even though the solubility of Ru in the Al-Mn-Si C54-phase was limited to only a few at.%, 3 at.% Ru substitution led to similar to 10% reduction of the lattice thermal conductivity. Grain size reduction with the assistance of the liquid quenching technique further reduced the magnitude of the lattice thermal conductivity, resulting in a value 38% smaller than that of the Ru-free Al-Mn-Si C54-phase.

引用

页码：1743 / 1748

页数：6

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