Orientation Distribution in Bi2Te3-Based Compound Prepared by Spark Plasma Sintering
P-type Bi0.5Sb1.5Te3 compounds doped with 3wt.% Te were fabricated by spark plasma sintering after mixing large powders(PL) and small powders(PS). We could obtained the highest figure of merit(Zc) of 2.89×10-3/K in sintered compound mixed to PL:PS=80:20. This resulted from the increase of orientation by large powders(PS) and the reduce of pores by small powders. The figure of merit(Zc) of the sintered compound using only small powders(PS) showed lower value of 2.67×10-3/K compared with that of sintered compound mixed to PL:PS=80:20 due to the increase of electrical resistivity.
Hyung Sun Kim, Sang-Yeop Park, Bo Young Hur and Soo Wohn Lee
K. T. Kim et al., "Orientation Distribution in Bi2Te3-Based Compound Prepared by Spark Plasma Sintering", Materials Science Forum, Vols. 486-487, pp. 646-649, 2005