| The p-type thermoelectric powders of 25%Bi₂Te₃-75%Sb₂Te₃ doped with 4wt%Te were prepared by high pressure gas atomizer. The new process with rapid solidification followed by pressing and sintering was investigated to produce homogeneous material. Characteristics of the material were examined with XRD, DSC, SEM, EPMA-line scan and bending test. Property variations of the materials were investigated as a function of variables, such as powder size, sintering temperature and annealing effect. Quenched powders and sintered materials consist of Bi₂Te₃ type of single phase. When the process parameters were optimized, the maximum figure of merit was 2.78×10^(-3)K^(-1). The bending strength of the material produced in this work was 4.68 ㎏f/㎟. |
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