Abstract

The p-type semiconductor Bi_2Te_3-Sb_2Te_3 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 1~3µm in size. The figure of meritz of sintered thermoelectric materials decreased with milling time because of lowered electrical resistivity. The thermoelectric properties of Bi_2Te_3-Sb_2Te_3 materials have been discussed in terms of electrical property with ball mill process.

• Keywords: Bi-Te-Sb;Thermoelectric Materials;Ball Mill;Spark plasma sintering;