Thermoelectric Properties of BiTe

Abstract

Research on crystal structures and thermoelectric properties has been carried out using BiTe material. The sintering method used is hot press. Hot press pressure comes from the bottom up. Temperature variations used in hot press are 400, 450, and 500°C. Analysis of crystal structure used XRD. Based on the XRD results, the result is that the crystal structure of BiTe bulk is hexagonal. Thermoelectric properties measurements used ZEM-3. The sample is measured in a temperature range of 50–200°C. Based on the measurements, the sample with hot press 500°C has the highest Seeback coefficient and power factor values which are –71µV/K and 3.6 x 10–4 W/mK2, respectively. The sample has the best performance at room temperature and has decreased performance with increasing temperature. While, the best electrical resistivity value is owned by the sample with hot press 450°C with a value of 1.28 mΩ cm at room temperature. Overall, the higher the temperature used when sintering, the better the performance produced. Thus, the BiTe material can be considered as a thermoelectric material.