METHOD FOR MANUFACTURING Bi-Te-BASED THERMOELECTRIC MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a BiTe-based thermoelectric material having high crystal anisotropy and excellent thermoelectric properties. SOLUTION: This method comprises a step of manufacturing a sintered compact by applying hot pressing to Bi-Te alloy powder prepared by mechanical alloying and having fine crystal grains and a step of applying electric current treatment to the sintered compact in a temperature atmosphere of 600-800 K in such a way that the electric current value of the sintered compact per unit area becomes 0.1 mA/cm<2> to 10 A/cm<2> .