Research on thermoelectric generation module based on Bi_2Te_3 alloy materials

In order to improve the property of Bi2Te3 thermoelectric materials,the Bi2Te3 alloy materials having temperature sensitivity at room temperture were prepared by a quick-smelting-sintering method using Bi2Te3 nanopowder as precursor.The thermoelectric figure of merit of prepared Bi2Te3 alloy materials reaches 0.548 at 425 K.Based on the Bi2Te3 alloy material,a kind of thermoelectric generation module was fabricated,and its properties were investigated.The results show that the module has good voltage-ampere property and stable inner resistance as well as the highest output power(0.39 W) when its temperatures of hot side and cold side are 140 and 60℃,respectively.The module possesses potential applied prospect.