The Effect of (Ag, Ni, Zn)-Addition on the Thermoelectric Properties of Copper Aluminate

Materials

Shun-ichi Yanagiya¹  Ngo Van Nong²  Jianxiao Xu² 

[1] Department of Electrical and Electronic Engineering, Hakodate National College of Technology, 14-1 Tokura, Hakodate, Hokkaido 042-8501, Japan;Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark, Roskilde 4000, Denmark; E-Mails:

关键词: copper aluminate;    oxide material;    element addition;    thermoelectric properties;   

DOI  :  10.3390/ma3010318

来源: mdpi

【 摘 要 】

Polycrystalline bulk copper aluminate Cu_1-x-yAg_xB_yAlO₂ with B = Ni or Zn were prepared by spark plasma sintering and subsequent thermal treatment. The influence of partial substitution of Ag, Ni and Zn for Cu-sites in CuAlO₂ on the high temperature thermoelectric properties has been studied. The addition of Ag and Zn was found to enhance the formation of CuAlO₂ phase and to increase the electrical conductivity. The addition of Ag or Ag and Ni on the other hand decreases the electrical conductivity. The highest power factor of 1.26 × 10^-4 W/mK² was obtained for the addition of Ag and Zn at 1,060 K, indicating a significant improvement compared with the non-doped CuAlO₂ sample.

【 授权许可】

CC BY   
© 2010 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.