关键词: 赝两元合金, 粉末冶金, 电学性能, 摩尔分数

Abstract: Pseudo-binary alloys (PbTe)_1-x(SnTe)_x (x=0～1) were firstly prepared by the powder
metallurgy method and their electrical properties were experimentally investigated. The results show that the grain size and pore size of the alloys
sintered at higher temperature are larger than those sintered at lower one. The maximum Seebeck coefficients decrease with mole fraction x
increasing, whereas the temperature, corresponding to the maximum Seebeck coefficients, shifts to higher temperature side when x
ranges from 0 to 0.6, and remains almost unchanged when x>0.6. The electrical conductivity reaches the maximum when mole fraction x
equals to 0.6. Besides, both Seebeck coefficients and electrical conductivities for all of the alloys sintered at high temperature
reveal similar variation with the temperature to those sintered at lower one, not only the Seebeck coefficients but also the electrical resistivities
for the alloys sintered at 550℃, however, are lower than those for the alloys with the same mole fraction but sintered at 725℃ when x≥0.2. It can be concluded, therefore, that
the resultant electrical properties are little influenced by sintering temperature for the pseudo-binary alloys (PbTe)_1-x(SnTe)_x.

Key words: pseudo-binary alloys （PbTe）_1-x（SnTe）_x, powder metallurgy, electrical properties, mole fraction