Preparation of Ni-doped ZnO ceramics for thermoelectric applications

被引：139
作者：
Colder, H. [1 ]
Guilmeau, E. [1 ]
Harnois, C. [1 ]
Marinel, S. [1 ]
Retoux, R. [1 ]
Savary, E. [1 ]
机构：
[1] ENS1CAEN, UCBN, CR1SMAT, F-14050 Caen, France
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2011年 / 31卷 / 15期
关键词：
Nanocomposites; ZnO; Electrical conductivity; Thermal conductivity; Thermoelectric; ZINC-OXIDE; AL; PERFORMANCE;
D O I：
10.1016/j.jeurceramsoc.2011.07.006
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Zn1-xNixO dense ceramics were prepared from Zn1-xNixO nanoparticles with x varying from 0 to 0.06. These nanoparticles were synthesized by liquid route. In the sintered samples, the solubility limit of Ni in the Zn1-xNixO wurtzite structure was found to be 0.03. The increase of x until 0.03 led to a significant raise in both electrical conductivity (sigma) and absolute value of Seebeck coefficient (vertical bar S vertical bar). Ni-richer samples (x > 0.03) contained in addition a small amount of Ni rich secondary phase (ZnyNizO) with a cubic structure similar to NiO. The thermoelectric properties of all samples were investigated from room temperature to 1000K. All doped samples showed a n-type semiconducting conductivity. For Ni contents higher than x = 0.03, the increase of the secondary phase content induced a decrease in sigma and vertical bar S vertical bar. The highest power factor (0.6 mW m(-1) K-2) and ZT (0.09) were found for Zn0.97Ni0.03O at 1000 K. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2957 / 2963
页数：7
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