발간논문

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Vol.36, No.4, 597 ~ 601, 1998
Title
Thermoelectric Properties of A . C . current assist Hot Pressed n-type 95%Bi2Te3+5%Bi2Se3 Thermoelectric Meterials
김익수 , 황창원 , 백동규 Ik Su Kim , Chang Won Hwang , Dong Kyu Paik
Abstract
The n-type thermoelectric material of 95% Bi₂Te₃+5% Bi₂Se₃ doped with CuBr were prepared by hot pressing method assited A. C current. Property variations of materials were investigated as a function of variables, such as hot pressing time and powder size. By this method, it is possible to minimize the defects arising from the vaporization of Te due to the very short processing time. At the conditions of hot pressing at 400℃ for 2 min. under 150Kgf/㎠, and the particle size of 70 to 125㎛ range of powder, the maximum Z value (figure of merit) was 2.2 x 10^(-3)K^(-1).
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