Nb_<2-x>Ce_xCuO_4焼結体の熱電特性 Thermoelectric Properties of Nd_<2-x>Ce_xO_4 Sintered Bodies
Thermoelectric power factor and figure of merit of Nd<SUB>2-x</SUB>Ce<SUB>x</SUB>CuO<SUB>4</SUB> (x=0-0.1) sintered bodies were estimated from the Seebeck coefficient, electrical resistivity, and thermal conductivity measured in temperature range of 300-673 K. Temperature dependence of Seebeck coefficient and electrical resistivity showed n-type semiconducting behavior. Thermal conductivities, which decreased with increasing temperature for each Cc concentration, were in range of 3.7-7.5 Wm<SUP>-1</SUP>K<SUP>-1</SUP>. The power factor and the figure of merit for x=0.01 and 0.05 increased with decreasing temperature. Their maxima were 9.2⋅10<SUP>-5</SUP> Wm<SUP>-1</SUP>K<SUP>-2</SUP> and 1.7⋅10<SUP>-5</SUP>K<SUP>-1</SUP>, respectively, at 320 K for x=0.05. The figure of merit would be improved to some extent by reduction of lattice thermal conductivity.
粉体および粉末冶金 44(1), 50-54, 1997-01-15
Japan Society of Powder and Powder Metallurgy