The Effect of Porosity and Milling Induced Defects on the Thermoelectric Properties of p-Type Bi2Te3-Based Bulks

被引：30

作者：

Zhang, Cheng Cheng ^{[1
]}

Fan, Xi An ^{[1
]}

Hu, Jie ^{[1
]}

Jiang, Cheng Peng ^{[1
]}

Feng, Bo ^{[1
]}

Xiang, Qiu Sheng ^{[1
]}

Li, Guang Qiang ^{[1
]}

Li, Ya Wei ^{[1
]}

机构：

[1] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Key Lab Ferrous Met & Resources Utilizat, Minist Educ,Sch Mat & Met, 185,947 Heping Rd, Wuhan 430081, Peoples R China

来源：

ADVANCED ENGINEERING MATERIALS | 2016年 / 18卷 / 10期

基金：

中国国家自然科学基金;

关键词：

BISMUTH-ANTIMONY TELLURIDE; ELECTRICAL-PROPERTIES; PERFORMANCE; ALLOYS; SOLIDIFICATION;

D O I：

10.1002/adem.201600295

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The p-type (Bi,Sb)(2)Te-3 bulks are prepared from ball-milling powders by resistance pressure sintering method and their thermoelectric properties are investigated as a function of ball milling time. Prolonging milling time would introduce more anti-site defects, interaction of vacancies and antisite defect, grain-boundaries and interface defects, leading to lower carrier concentration and mobility. The peak value of ZT = 1.0 is achieved at 300 K for the 5 h sample. When the testing temperature is over 323 K, the ZT value of the 0 h sample is higher than that of the 5 h sample. The effect of porosity on the thermoelectric properties is also investigated by effective medium theory. As the porosity increased, the electrical resistivity increases and the thermal conductivity decrease.

引用

页码：1777 / 1784

页数：8

共 29 条

[1] Improved thermoelectric properties of Bi2Te3-xSex alloys by melt spinning and resistance pressing sintering [J].