(28/0/100)PLZT 陶瓷介电性能及显微结构研究  

Research on Dielectric Properties and Microstructure of PLZT(28/0/100) Ceramics

作　　者：黄毓虹 罗维根[1] 丁爱丽[1] 张瑞涛 葛敏[1] 宋祥云[1] 王评初[1] 

机构地区：[1]中国科学院上海硅酸盐研究所

出　　处：《无机材料学报》1992年第3期313-317,共5页Journal of Inorganic Materials

摘　　要：本文作者测量了(28/0/100)PLZT 陶瓷的介电性能,获得了常温及液氮温度下的透射电子衍射象.首次在陶瓷材料中观察到电子波在材料中卫星环状漫散射现象.作者从晶体的衍射及漫散射理论出发,将获得的倒易空间信息还原到正空间.结合材料介电性能的测量,提出了(28/0/100)PLZT材料的低温相变模型.随着温度降低,材料中出现与基体共格的球形小区域,在球形小区域的周围出现具有方向性和周期性的晶格畸变.We have measured the dielectric properties of PLZT(28/0/100)ceramics and have got thetransmit electron diffraction patterns at room temperature and liquid-nitrogen temperature.For the first time,we observed the ringlike Satellite diffusion of electron wave in ceramicsmaterials.According to the theories of diffraction and diffusion,we returned the K-space toreal space.Based on the measurement of dielectric properties,the low temperature phasetransformation mechanism is proposed to PLZT(28/0/100)ceramics.When temperature islowering,small spherical regions which have same lattice with base material appear in theceramics.There is lattice deformation which is orientated and periodic around these regions.

关 键 词：PLZT 陶瓷 电子衍射 显微结构 

分 类 号：TQ174.758[化学工程—陶瓷工业]