Optimization of p-type Segmented Bi_2Te_3/CoSb_3 Thermoelectric Material Prepared by Spark Plasma Sintering

摘要

A kind of p-type segmented Bi_2Te_3/CoSb_3 thermoelectric material was prepared by spark plasma sintering (SPS). When the segmented materials were used at the temperature ranging from 300 K to 800 K, the junction temperature was optimized, which is about 500 K, and the corresponding length ratio of CoSb_3 to Bi_2Te_3 is about 15 : 2. The measured maximum power output of segmented, materials is about 320 W centre dot m~(-2) , which is about 1.8 times as high as that of monolithic material CoSb_3 under the same measuring conditions.