Improvement of textured Bi1.6Pb0.4Sr2Co1.8Ox thermoelectric performances by metallic Ag additions

被引：45

作者：

Sotelo, A. ^{[1
]}

Rasekh, Sh. ^{[1
]}

Constantinescu, G. ^{[1
]}

Torres, M. A. ^{[2
]}

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

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

机构：

[1] Univ Zaragoza, Inst Ciencia Mat Aragon, CSIC, Zaragoza 50018, Spain

[2] Univ Zaragoza, Dept Ingn Diseno & Fabricac, Zaragoza 50018, Spain

来源：

CERAMICS INTERNATIONAL | 2013年 / 39卷 / 02期

关键词：

Grain growth; Platelets; Microstructure-final; Electrical properties; SINGLE-CRYSTAL; CERAMICS; SR; MAGNETORESISTANCE; FABRICATION; COBALTITES; OXIDES; LAYERS; PHASE; POWER;

D O I：

10.1016/j.ceramint.2012.07.112

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：

Bi1.6Pb0.4Sr2Co1.8Ox thermoelectric ceramics with small Ag additions (0, 1, and 3 wt%) have been successfully grown from the melt, using the laser floating zone method. Microstructure has shown a reduction in the amount of secondary phases and a better grain alignment with respect to the growth direction for an Ag content of 3 wt%. The microstructural evolution, as a function of Ag content, is confirmed with the electrical resistivity values, which show an important decrease for the 3 wt% Ag samples, leading to maximum power factor values of about 0.42 mW/K-2 m at 650 degrees C, which are among the best results obtained in this type of material. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：1597 / 1602

页数：6

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