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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

Ba填充方钴矿化合物的高压合成及热电性能

秦丙克1, 李小雷1, 李尚升1, 宿太超1, 马红安2, 贾晓鹏1,2   

  1. (1. 河南理工大学 材料科学与工程学院, 焦作 454000; 2. 吉林大学 超硬材料国家重点实验室, 长春 130012)
  • 收稿日期:2009-04-23 修回日期:2009-08-02 出版日期:2010-01-24 网络出版日期:2010-01-24

High Pressure Synthesis and Thermoelectric Properties of the Ba-filled Skutterudites

QIN Bing-Ke1, LI Xiao-Lei1, LI Shang-Sheng1, SU Tai-Chao1, MA Hong-An2, JIA Xiao-Peng1, 2   

  1. (1.Institute of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China; 2. National Lab of Superhard Materials, Jilin University, Changchun 130012, China)
  • Received:2009-04-23 Revised:2009-08-02 Published:2010-01-24 Online:2010-01-24

PDF (PC)

1639

被引次数

7

摘要： 利用高压固相反应方法成功合成了Ba填充型方钴矿化合物BaxCo4Sb12(0.2≤x≤0.8), 并探讨了Ba填充及合成压强对化合物电学性能的影响. 采用XRD和SEM确定了相组成和晶体形貌, 并在室温下测试了材料的电阻率及Seebeck系数. 实验结果表明：高压可有助于提高Ba在CoSb3中的填充含量; 化合物BaxCo4Sb12的晶粒直径处于微纳米级而且样品中含有大量的微气孔; 在合成压强为4.25GPa时, 样品Ba0.8Co4Sb12获得最高的功率因子13.19μW/(cm·K2).

关键词: 热电材料, 方钴矿, 钡填充, 高压合成

Abstract: Polycrystalline skutterudite compounds BaxCo4Sb12 (0.2≤x≤0.8) were successfully synthesized by solid state reaction under high pressure (2-5GPa). The crystallographic figures and microstructure were characterized by X-ray diffraction and electron probe microanalysis separately. Seebeck coefficient and electrical resistivity were measured at room temperature. The results show that high-pressure synthesis method can improve the Ba-filled content effectively. The samples have few micro-pores with fine-grai1ned structure, their grain diameter sizes are in the micro-nanometer range. The maximum power factor value of the sample Ba0.8Co4Sb12 obtained at 4.25GPa is 13.19μW/(cm·K2).

Key words: thermoelectric materials, Ba-filled, skutterudite, high pressure synthesis