Improvement of thermoelectric and mechanical properties of BiCuSeO-based materials by SiC nanodispersion

被引：20

作者：

Feng, Bo ^{[1
,2
,3
]}

Li, Guangqiang ^{[1
,2
,3
]}

Hu, Xiaoming ^{[1
,2
,3
]}

Liu, Peihai ^{[1
,2
,3
]}

Li, Rusong ^{[1
,2
,3
]}

Zhang, Yanglin ^{[1
,2
,3
]}

Li, Yawei ^{[1
,2
,3
]}

He, Zhu ^{[1
,2
,3
]}

Fan, Xi'an ^{[1
,2
,3
]}

机构：

[1] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China

[2] Wuhan Univ Sci & Technol, Natl Prov Joint Engn Res Ctr High Temp Mat & Lini, Wuhan 430081, Peoples R China

[3] Wuhan Univ Sci & Technol, Key Lab Ferrous Met & Resources Utilizat, Minist Educ, Wuhan 430081, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 818卷

基金：

中国国家自然科学基金;

关键词：

BiCuSeO; Nanocomposites; Thermoelectric properties; Dispersion strengthening; THERMAL-STABILITY; PERFORMANCE; OXYSELENIDES; ZT;

D O I：

10.1016/j.jallcom.2019.152899

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Thermoelectric materials have great application prospects in the fields of micro-refrigeration, waste heat utilization and catalysis, and BiCuSeO is one of the oxide thermoelectric materials with the best comprehensive thermoelectric properties at present. Herein, the dispersion of 20-nm SiC in BiCuSeO matrix has greatly increases the thermoelectric and mechanical properties of the system. SiC nanoparticles dispersed in BiCuSeO matrix can act as energy filters to increase the Seebeck coefficient, on the other hand, as phonon scattering centers to scatter the low- and mid-frequency phonons effectively to reduce the lattice thermal conductivity, combined with point defects such as Pb-Bi(+) scattering the high-frequency phonons, thus achieving the scattering enhancement of full-frequency phonons. In addition, the mechanical strength and machinability of BiCuSeO have been improved significantly due to the dispersion strengthening effect of SiC nanoparticles. (C) 2019 Elsevier B.V. All rights reserved.

引用

页数：7

共 34 条

[1] On the role of alloy composition and processing parameters in nanocluster formation and dispersion strengthening in nanostuctured ferritic alloys [J].