【作者】 李佳； 张忻； 路清梅； 张久兴； 卫群；

【Author】 LI Jia ZHANG Xin LU Qing-mei ZHANG Jiu-xing WEI Qun (The key Laboratory of Advanced Functional Materials,Ministry of Education,College of Materials Science and Engineering,Beijing University of Technology,Beijing 100022,China)

【机构】 北京工业大学材料学院新型功能材料教育部重点实验室；

【摘要】 采用区熔法和机械球磨（MM）与放电等离子烧结（SPS）技术相结合制备 P 型 Bi₂Te₃基热电材料, 在300～423K 的温度范围内测试了样品的电导率, Seebeck 系数和热导率。系统研究了球磨时间对合金化与热电性能的影响,球磨10h 的样品在室温时具有最低的热导率,因此其热电优值高于其它样品,在室温时达到最大值0．995．更多还原

【Abstract】 the P type Bi₂Te₃ based thermoelectric materials were prepared by zone-melting、mechanical aUoying（MM） and spark plasma sintering.Electrical conductivity,Seebeck coefficient and thermal conductivity of the sintered samples were measured in the temperature range of 300K-423K.The effect of milling lime on alloy formation and thermal properties was investigated in system.The optimal figure of merit ZT of the milling for 10h sintering material was highest because of low thermal conductivity.And it reached 0.995 at room temperature.更多还原