无机材料学报

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纳米PbF2的制备、物相组成和离子导电性

刘金芳1; 吴希俊1; 许国良1; 王评初2   

  1. 1. 浙江大学材料科学与工程系; 杭州 310027; 2. 中国科学院上海硅酸盐研究所; 上海 200050
  • 收稿日期:1999-05-26 修回日期:1999-08-09 出版日期:2000-06-20 网络出版日期:2000-06-20

Preparation, Phase Constitution and Ionic Conductivity of Nanophase PbF2

LIU Jin-Fang1; WU Xi-Jun1; XU Guo-Liang1; WANG Ping-Chu 2   

  1. 1.Department of Materials Science and Engineering; Zhejiang University; Hangzhou 310027; China; 2.Shanghai Institute of ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:1999-05-26 Revised:1999-08-09 Published:2000-06-20 Online:2000-06-20

摘要: 采用惰性气体蒸发和原位真空压结法制备了具有清洁界面的纳米PbF2块材.通过X射线衍射、差热分析和复平面阻抗谱方法,研究了相结构、相变和离子电导率.结果表明,纳米PbF2比粗晶PbF2的离子电导率大幅提高,相变温度降低了30℃.

关键词: 纳米氟化物, 相变, 离子导电率

Abstract: The bulk samples of nanophase PbF2(n-PbF2) with the clean interfaces were prepared by using an inert gas evaporation and in situ compacting technique. The phase constitution and ionic conductivity were studied by XRD, DSC and complex impedance spectra. The results show that the ionic conductivity of n-PbF2 is rather higher than that of coarse-grained PbF2. The temperature of phase transition from α-phase to β-phase for n-PbF2 drops about 30℃ compared with that of coaxse-grained PbF2.

Key words: nanophase fluoride, phase transition, ionic conductivity

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