Effect of TiO2 on high-temperature thermoelectric properties of ZnO

被引：73

作者：

Park, K. ^{[1
]}

Ko, K. Y. ^{[1
]}

机构：

[1] Sejong Univ, Dept Adv Mat Engn, Seoul 143747, South Korea

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 430卷 / 1-2期

关键词：

sintering; electron microscopy; electrical properties; TiO2; microstructure; ZnO;

D O I：

10.1016/j.jallcom.2006.04.065

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：

The as-sintered Zn1-xTixO (0.01 <= x <= 0.05) samples contained a solid solution of Zn1-xTixO with a wurtzite structure and a small amount of the cubic spinel Zn2TiO4. The amount of Zn2TiO4 increased with an increase in TiO2 content. The density and grain size increased with the small TiO2 content (<= 0.01), and then they decreased gradually by further increasing the TiO2 content. The addition of TiO2 to ZnO led to a significant increase in the electrical conductivity and a decrease in the absolute value of the Seebeck coefficient, resulting in an increase in the power factor. The highest value of power factor (7.6 x 10(-4) W m(-1) K-2) was attained for Zn0.98Ti0.02O at 1073 K. It is demonstrated that the TiO2 addition is fairly effective for enhancing thermoelectric properties. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：200 / 204

页数：5

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