Thermoelectric properties of oxide solid solutions based on Al-doped ZnO

被引：18

作者：

Ohtaki, M ^{[1
]}

Tsubota, T ^{[1
]}

Eguchi, K ^{[1
]}

机构：

[1] Kyushu Univ, Grad Sch Engn Sci, Dept Mol & Mat Sci, Kasuga, Fukuoka 8168580, Japan

来源：

XVII INTERNATIONAL CONFERENCE ON THERMOELECTRICS, PROCEEDINGS ICT 98 | 1998年

关键词：

D O I：

10.1109/ICT.1998.740453

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Investigation on thermoelectric properties of oxide solid solutions based on Zn0.98Al0.02O revealed that the thermal conductivity of Al-doped ZnO was markedly suppressed via formation of solid solution, particularly for those with MgO. The decrease in the thermal conductivity was significant at the lower temperatures, and at room temperature, (Zn0.9Mg0.1)(0.98)Al0.02O attained a value less than a quarter of that for Zn0.98Al0.02O. However, the electrical conductivity also decreased, while the Seebeck coefficients almost unchanged. The Hall measurements revealed reduction in both the carrier concentration and the Hall mobility for the solid solution samples. In spite of the significant suppression of the thermal conductivity, improvement in the figure of merit was unsuccessful for the MgO-doped samples because of the unfavorable decrease in the electrical conductivity.

引用

页码：610 / 613

页数：4