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.