볼밀링한 Bi-Te-Sb계 분말의 열전특성에 관한 연구

Abstract

The p-type semiconductor Bi2Te3-Sb2Te3 thermoelectric materials were fabricated by melting, milling and sintering process and their thermoelectric properties were characterized. The compound materials were ball-milled with milling time and the powders were sintered by spark plasma sintering process. The ball milled powders had equiaxial shape and approedmately 1~3 mm in size. The figure of meritz of sintered thermoelectric materials decreased with milling time because of lowered electrical resistivity. The thermoelectric properties of Bi2Te3-Sb2Te3 materials have been discussed in terms of electrical property with ball mill process.