Enhanced thermoelectric properties of Cu2-Se nanopowder dispersed Bi2Ba2Co2Oy ceramics

被引：22

作者：

Cao, Ruijuan ^{[1
,2
]}

Li, Erying ^{[1
,2
]}

Hu, Qiujun ^{[1
,2
]}

Zhu, Zheng ^{[1
,2
]}

Zhang, Yan ^{[1
,2
]}

Li, Xinjian ^{[1
,2
]}

Hu, Xing ^{[1
,2
]}

Song, Hongzhang ^{[1
,2
]}

机构：

[1] Zhengzhou Univ, Minist Educ, Key Lab Mat Phys, Zhengzhou 450001, Henan, Peoples R China

[2] Zhengzhou Univ, Sch Phys & Engn, Zhengzhou 450001, Henan, Peoples R China

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2018年 / 124卷 / 10期

基金：

中国国家自然科学基金;

关键词：

PERFORMANCE; FIGURE; MERIT; POWER; SNSE;

D O I：

10.1007/s00339-018-2095-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Bi2Ba2Co2Oy ceramics dispersed with xwt% Cu2-Se (x=0.00, 0.25, 0.50, 0.75, 1.00, 1.25 and 1.50) nanopowders were synthesized by the solid-state reaction method and the effects of Cu2-Se dispersion on the thermoelectric properties were investigated. The thinner and better aligned lamellar structures were observed in the Cu2-Se dispersed Bi2Ba2Co2Oy samples, which resulted in the significant reducing of thermal conductivities due to the enhanced phonon scattering by the lamellar structures. At the same time, the electrical resistivity was reduced evidently by an appropriate amount of Cu2-Se dispersion owing to its low electrical resistivity. As a result, all the Cu2-Se dispersed samples exhibited higher figure of merit (ZT), indicating that Cu2-Se dispersion is an effective method to raise the thermoelectric properties of Bi2Ba2Co2Oy ceramic. The maximum ZT value 0.21 was achieved at 873K when the Cu2-Se amount is 0.5wt%, which is increased about 35% compared with the undispersed sample.

引用

页数：6

共 28 条

[1] Cooling, heating, generating power, and recovering waste heat with thermoelectric systems [J].