固相反应法快速制备纳米结构CoSb3及其热电性能（英文）  

Thermoelectric Properties of Nanostructured CoSb3 Fast Prepared by Solid-State Reaction

作　　者：秦丙克[1,2] 籍永华[2] 白志玲[2] 黄润[1] 张金柱[1] Qin Bingke;Ji Yonghua;Bai Zhiling;Huang Run;Zhang Jinzhu(Guizhou University,Guiyang 550025,China;Liupanshui Normal University,Liupanshui 553004,China)

机构地区：[1]贵州大学,贵州贵阳550025 [2]六盘水师范学院,贵州六盘水553004

出　　处：《稀有金属材料与工程》2019年第10期3118-3123,共6页Rare Metal Materials and Engineering

基　　金：Guizhou Provincial Department of Education Foundation(Qianjiaohe KYzi[2016]102);National Natural Science Foundation of China(51764005);Liupanshui Science and Technology Foundation(52020-2018-04-05)

摘　　要：采用固相反应法成功合成了具有纳米结构的p型Co Sb3。采用XRD和SEM对样品的物相组成和晶体结构进行了表征。在室温下对不同温度和保温时间制备的样品进行了电学性质测试,选择了室温功率因子较高的样品,研究了不同温度下的热电性能。结果表明:采用球磨结合固相反应法可以制备出单相的方钴矿热电材料,所制备的样品内部含有孔径均匀的微气孔,晶粒尺寸在纳米范围。当制备温度为863 K时,在测试温度469.8 K时,样品获得最大Seebeck系数222.64μV/K。当样品制备温度903 K时,样品测试温度570 K时获得最大功率因子132.17μW/(m·K^2),且在测试温度600 K时得到最大的热电优值ZT约为0.053。Nanostructured p-type Co Sb3 was successfully synthesized by solid-state reaction method.The phase composition and crystallographic structure were characterized by X-ray diffraction and scanning electron microscopy,respectively.The electrical properties of the samples prepared with different temperatures and holding time were tested at room temperature.The samples with better power factor at room temperature were selected to study the thermoelectric properties at different temperatures.The results show that the single phase skutterudite thermoelectric materials can be prepared by ball milling combined with solid-state reaction.The obtained samples have many uniform micron-sized pores and the grains are in the nanometer range.The maximum Seebeck coefficient of 222.64 μV/K is obtained at 469.8 K when the sample is synthesized at 863 K.The maximum power factor of 132.17 μW/(m·K^2) is obtained at 570 K and the maximum thermoelectric figure of merit ZT of ~0.053 is obtained at 600 K when the sample is synthesized at 903 K.

关 键 词：CoSb3 固相反应 微观结构 热电性能 

分 类 号：TB3[一般工业技术—材料科学与工程]