Thermoelectric properties of non-doped and Y-doped SrTiO3 polycrystals synthesized by polymerized complex process and hot pressing

被引：46

作者：

Ito, Mikio ^{[1
]}

Matsuda, Tomoaki ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn, Div Mat & Mfg Sci, Course Mat Sci & Engn, Suita, Osaka 5650871, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 477卷 / 1-2期

关键词：

Thermoelectric oxide; Perovskite SrTiO3; Polymerized complex process; Thermoelectric properties; Hot pressing; CITRIC-ACID COMPLEX; ELECTRICAL-PROPERTIES;

D O I：

10.1016/j.jallcom.2008.10.031

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：

Synthesis of non-doped and Y-doped SrTiO3 polycrystals was tried by the polymerized complex (PC) process and the subsequent hot pressing at 1473 K and 1673 K. The effects of hot pressing temperature on thermoelectric properties of these SrTiO3 sintered bulks were investigated. The PC process could provide the powder precursor with perovskite SrTiO3 structure even when Y was substituted for Sr site. And then, the SrTiO3 phase was mostly maintained after hot pressing. The Y doping slightly accelerated densification of compacts during the hot pressing. From these results, among the polycrystalline bulks fabricated in this study, the Sr0.9Y0.1TiO3 sample hot-pressed at 1673 K showed the maximum dimensionless figure of merit, 0.146 at 870 K. This figure of merit is lower than that of earlier results [H. Muta, K. Kurosaki, S. Yamanaka, J. Alloys Compd. 350 (2003) 292-295]. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：473 / 477

页数：5

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