Title :
Effect of mechanical grinding on the thermoelectric properties of CoSb3-FeSb2 composite
Author :
Katsuyama, S. ; Kanayama, Y. ; Ito, M. ; Majima, K. ; Nagai, H.
Author_Institution :
Dept. of Mater. Sci. & Process., Osaka Univ., Japan
Abstract :
We have prepared the CoSb3-FeSb2 composite with MG technique and investigated the Seebeck coefficient, electrical resistivity and thermal conductivity to estimate the corresponding figure of merit. The electrical resistivity and thermal conductivity of the composite are smaller than those of CoSb3. The less increase of the electrical resistivity and the decrease of the thermal conductivity are ascribed to the low resistivity of FeSb2 and the enhancement of the phonon scattering caused by the dispersion of FeSb2 into the matrix. As a result, the composite whose molar ratio of CoSb3 to FeSb2 is 0.8:0.2 and MG time is 25 h has a maximum value of figure of merit of 5.5×10-4 K-1 at 756 K
Keywords :
Seebeck effect; cobalt compounds; electrical resistivity; electron-phonon interactions; grinding; iron compounds; thermal conductivity; thermoelectricity; 25 h; 756 K; CoSb3-FeSb2; CoSb3-FeSb2 composite; Seebeck coefficient; electrical resistivity; figure of merit; mechanical grinding; phonon scattering; thermal conductivity; thermoelectric properties; Conducting materials; Electric resistance; Lattices; Mechanical factors; Particle scattering; Phonons; Powders; Thermal conductivity; Thermal resistance; Thermoelectricity;
Conference_Titel :
Thermoelectrics, 1998. Proceedings ICT 98. XVII International Conference on
Conference_Location :
Nagoya
Print_ISBN :
0-7803-4907-5
DOI :
10.1109/ICT.1998.740390
