期刊
MATERIALS RESEARCH BULLETIN
卷 45, 期 7, 页码 809-812出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2010.03.018
关键词
Oxides; Ceramics; Electrical properties; Thermal conductivity
资金
- National Basic Research Program of China [2007CB607504]
- Natural Science Fund of China [50572052]
Ceramic samples of La0.1Sr0.9-xDyxTiO3 (x = 0.01, 0.03, 0.07, 0.10) have been prepared by the solid-state reaction method. Characterization from the powder X-ray diffraction indicates that their crystal structure changes from cubic to tetragonal phase. Their electrical and thermal transport properties are measured in the temperature range of 300-1100 K. n-Type thermoelectric is obtained with large Seebeck coefficient. The figure of merit is markedly improved, due to relatively lower electrical resistivity and thermal conductivity by Dy doping effect. A much lower electrical resistivity of 0.8 m Omega cm at room temperature is obtained in La0.1Sr0.8Dy0.1TiO3, and with a relatively lower thermal conductivity of 2.5 W/m K at 1075 K. The maximum figure of merit reaches similar to 0.36 at 1045 K for La0.1Sr0.83Dy0.07TiO3, which is the largest value among n-type oxide thermoelectric ceramics. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据