Improved thermoelectric performances in textured Bi1.6Pb0.4Ba2Co2Oy/Ag composites

被引：4

作者：

Sotelo, A. ^{[1
]}

Rasekh, Sh. ^{[1
]}

Torres, M. A. ^{[1
]}

Bosque, P. ^{[1
]}

Madre, M. A. ^{[1
]}

Diez, J. C. ^{[1
]}

机构：

[1] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, Ma de Luna 3, Zaragoza 50018, Spain

来源：

CERAMICS INTERNATIONAL | 2016年 / 42卷 / 16期

关键词：

Ceramic composite; Grain growth; Texturing; Microstructure; Electrical properties; ENHANCEMENT; CERAMICS; PB; AG; THERMOPOWER; FABRICATION; COBALTITES; CA3CO4O9; GROWTH; POWER;

D O I：

10.1016/j.ceramint.2016.08.202

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Bi1.6Pb0.4Ba2Co2Oy thermoelectric ceramics with small Ag additions (0, 1, 3, and 5 wt%) have been textured using the laser floating zone method. Microstructure has shown a slight decrease on the secondary phases content and a better grain alignment in Ag added samples. These microstructural features are reflected in the thermoelectric properties, which have shown a significant decrease of electrical resistivity, when the Ag content is raised. In spite of a corresponding decrease of Seebeck coefficient, all the Ag-containing samples possess higher Power Factor values than the Bi1.6Pb0.4Ba2Co2Oy ones. Moreover, the maximum Power Factor values (about 0.36 mW/K-2.m at 650 degrees C) have been measured in Bi1.6Pb0.4Ba2Co2Oy+3 wt% Ag samples, which are the best results reported in this family of materials. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：18592 / 18596

页数：5

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