PbTe纳米粉形貌调控及对其块体热电性能的影响  

Effects of Different Morphologies of PbTe Nano-powders on Bulk Thermoelectric Properties

作　　者：董惠芝 王广江[2] 宋红章[1] 杨德林[1] 

机构地区：[1]郑州大学物理工程学院,材料物理教育部重点实验室,郑州450052 [2]河南广播电视大学机电工程学院,郑州450000

出　　处：《材料导报》2016年第18期42-45,共4页Materials Reports

基　　金：河南省高等学校重点科研项目(16A140036)

摘　　要：通过调控水热法的工艺参数制备出3种不同形貌的纯PbTe纳米粉末,形貌分别为漏斗状、堆积棒状和枝叶花状。将所得纳米粉末真空热压成块体后进行热电性能测试,发现不同的纳米粉体形貌对其块体的微观结构和热电性能有重要的影响。其中,枝叶花状形貌纳米粉制备的块体有较高的功率因子和较低的热导率,热电性能得到明显提高。Three different morphologies （funnel-shaped, rodlike and leaf-flower） of PbTe powders were successfully fabricated by controlling the experimental parameters of the hydrothermal method. The powders were hot- pressed into bulk samples and their thermoelectric properties were measured. It was found that the morphology of nano-powder had an important influence on mierostructure and thermoelectric properties of the bulk samples. The results showed that the leaf-flower morphology could improve the thermoelectric properties obviously because of its higher power factor and lower thermal conductivity.

关 键 词：水热法 纳米粉 形貌调控 热电性能 

分 类 号：TB34[一般工业技术—材料科学与工程]