Articles
  • Effect of Ca doping on the thermoelectric properties of SrCu2O2
  • Octolia Togibasa Tambunana, Il-Ho Kimb, Bo Wha Leea and Chunli Liua,*
  • a Department of Physics, Hankuk University of Foreign Studies, Yongin, Kyeonggi, 449-791, Korea b Department of Material Science and Engineering, Chungju National University, Chungju, Chungbuk, 380-702, Korea
Abstract
The thermoelectric properties of p-type oxide SrCu2O2 doped with Ca with amounts of 0, 3, 10, and 15% have been studied. The Seebeck coefficients were found to be positive for all the samples in the temperature range between 423 and 923 K. Although no effective enhancement of the electrical conductivity was observed, doping with Ca clearly improved the Seebeck coefficients and the thermal conductivity of SrCu2O2. SrCu2O2 doped with 10% Ca showed the lowest thermal conductivity that varied from 0.32 W/mK at 423 K to 0.66 W/mK at 923 K. Overall, the value of ZT of Ca-doped SrCu2O2 was slightly larger than that of the un-doped SrCu2O2. SrCu2O2 doped with 15% of Ca showed the highest ZT of 2.67×10-3 at 423 K and 4.38×10-3 at 923 K.

Keywords: SrCu2O2, Thermoelectric property, Calcium, Doping.

This Article

  • 2012; 13(3): 258-261