AgSbTe_2热电化合物的超声化学法合成  

Sonochemicial Synthesis of AgSbTe_2 Thermoelectric Compounds

作　　者：徐静静[1] 杜保立[1] 张文浩[1] 唐新峰[1] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,武汉430070

出　　处：《无机材料学报》2010年第6期593-597,共5页Journal of Inorganic Materials

基　　金：国家973计划项目(2007CB607501)

摘　　要：采用超声化学法结合还原热处理合成了单相的AgSbTe2粉体,并结合放电等离子烧结（SPS）制备了相应的块体.系统研究了不同前驱体制备条件、热处理温度、时间和起始化学计量比对相组成的影响,并对烧结块体的热电性能进行了初步研究.结果表明：超声化学法合成的前驱体在500℃、2h还原热处理后可以得到近单相的AgSbTe2,且通过调节起始原料的摩尔比可以得到单相的AgSbTe2.所得粉体颗粒平均粒径约为10μm,表面均匀分布着20-50nm的纳米颗粒.性能测试表明单相样品的无量纲热电优值ZT值在570K最大可达1.14.Single-phase AgSbTe2 powder was synthesized by sonochemicial method combining with deoxidizing heat-treatment.The influences of heat-treatment temperature,time and the initial ratio of starting reactants on the phases of the final products were investigated.Near single-phase AgSbTe2 ternary powder can be obtained after 2h heat treatment under 500℃,and single-phase AgSbTe2 can be obtained by changing the initio ratio of the starting reactants.Microstructure analysis shows that nanodots with dimension of 20-50nm are uniformly distributed on the surface of the as-prepared powders with the average size of about 10μm.A dimensionless thermoelectric figure of merit ZT = 1.14 is obtained at 570K for the sample with single phase.

关 键 词：AgSbTe2 超声化学法 热处理 热电材料 

分 类 号：TB34[一般工业技术—材料科学与工程]