Thermoelectric properties of Sr1−xNdxTiO3 ceramics
Thermoelectric properties of Sr1−xNdxTiO3 ceramics
复制标题
DOI：
10.1016/j.jallcom.2009.11.165
复制
发表时间：
2010-03
影响因子：
6.2
通讯作者：
Jianjun Liu;C. Wang;W. Su;H. Wang;J. Li;J. L. Zhang;L. Mei
中科院分区：
文献类型：
--
作者：
Jianjun Liu;C. Wang;W. Su;H. Wang;J. Li;J. L. Zhang;L. Mei
研究了Sr1−xNdxTiO3（x=0.02, 0.05, 0.10）陶瓷在室温至873K范围内的热电性能。塞贝克系数呈现窄带特性，带宽随Nd含量的增加而增大。随着Nd含量的增加，Seebeck系数的大小减小，电导率随着载流子浓度的增加而增加。同时，导热系数降低；因此，晶格的导热系数降低了。sr0.9 nd0.1 tio3样品在873K时的优值最大值达到0.28，表明Nd取代是提高钛酸锶热电性能的一种很有前途的方法。
The thermoelectric properties of Sr1−xNdxTiO3(x=0.02, 0.05, 0.10) ceramics were investigated from room temperature to 873K. The Seebeck coefficients presented a narrow-band behaviour, where the bandwidth increased with an increase of Nd content. With increasing Nd content, the magnitude of the Seebeck coefficient decreased, and the electrical conductivity increased because of the increase in carrier concentration. At the same time, the thermal conductivity decreased; because of that, the lattice thermal conductivity was reduced. The maximum value of the figure of merit reached 0.28 at 873K for the Sr0.9Nd0.1TiO3sample, showing that Nd substitution is a promising approach for enhancement of the thermoelectric performance of strontium titanates.