Thermoelectric properties of the yttrium-doped ceramic oxide SrTiO3
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- 作者：Tamal Tahsin Khan ; Soon-Chul Ur
- 关键词：Ceramic oxide ; SrTiO3 ; Thermoelectric properties ; Yttrium doping
- 刊名：Journal of the Korean Physical Society
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：70
- 期：1
- 页码：93-97
- 全文大小：
- 刊物主题：Physics, general; Theoretical, Mathematical and Computational Physics; Particle and Nuclear Physics;
- 出版者：The Korean Physical Society
- ISSN：1976-8524
- 卷排序：70
文摘
The doping dependence of the thermoelectric figure of merit, ZT, of the ceramic oxide SrTiO3 at high temperature has been studied. In this study, yttrium was used as the doping element. A conventional solid-state reaction method was used for the preparation of Y-doped SrTiO3. The doping level in SrTiO3 was controlled to be in the doping range of 2 - 10 mole%. Almost all the yttrium atoms incorporated into the SrTiO3 provided charge carriers, as was observed by using X-ray diffraction pattern. The relative densities of all the samples varied from 98.53% to 99.45%. The thermoelectric properties, including the electrical conductivity σ, Seebeck coefficient S, thermal conductivity k, and the figure of merit, ZT, were investigated at medium temperatures. The ZT value showed an obvious doping level dependence, in which a value as high as 0.18 is realized at 773 K for a doping of 8 mole%.