AgSbTe2热电化合物的超声化学法合成

doi:10.3724/SP.J.1077.2010.00593

无机材料学报 ›› 2010, Vol. 25 ›› Issue (6): 593-597.DOI: 10.3724/SP.J.1077.2010.00593

AgSbTe₂热电化合物的超声化学法合成

徐静静, 杜保立, 张文浩, 唐新峰

(武汉理工大学材料复合新技术国家重点实验室, 武汉 430070)

收稿日期:2009-10-14 修回日期:2009-12-31 出版日期:2010-06-20 网络出版日期:2010-05-12
基金资助:
国家973计划项目(2007CB607501)

Sonochemicial Synthesis of AgSbTe₂ Thermoelectric Compounds

XU Jing-Jing, DU Bao-Li, ZHANG Wen-Hao, TANG Xin-Feng

(State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology,Wuhan 430070, China)

Received:2009-10-14 Revised:2009-12-31 Published:2010-06-20 Online:2010-05-12

摘要/Abstract

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10?m, 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.

关键词: AgSbTe₂, 超声化学法, 热处理, 热电材料

Abstract: 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 10?m. A dimensionless thermoelectric figure of merit ZT = 1.14 is obtained at 570K for the sample with single phase.

Key words: AgSbTe₂, sonochemicial method, heat treament, thermoelectric materials

中图分类号:

TB34

徐静静, 杜保立, 张文浩, 唐新峰. AgSbTe₂热电化合物的超声化学法合成[J]. 无机材料学报, 2010, 25(6): 593-597.

XU Jing-Jing, DU Bao-Li, ZHANG Wen-Hao, TANG Xin-Feng. Sonochemicial Synthesis of AgSbTe₂ Thermoelectric Compounds[J]. Journal of Inorganic Materials, 2010, 25(6): 593-597.

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AgSbTe₂热电化合物的超声化学法合成

Sonochemicial Synthesis of AgSbTe₂ Thermoelectric Compounds

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