PTC型BaTiO_3陶瓷的孪晶和孪晶界  

TWIN AND TWIN BOUNDARY IN PTC BaTiO_3 CERAMICS

作　　者：宋详云 邓小华[1] 祝炳和[1] 马利泰[1] 温树林[1] 

机构地区：[1]中国科学院上海硅酸盐研究所

出　　处：《硅酸盐学报》1991年第5期385-388,共4页Journal of The Chinese Ceramic Society

摘　　要：用透射电镜和高分辨电镜观察研究了PTC型BaTiO_3陶瓷的孪晶和孪晶界结构,并提出了可能的{111}孪晶及孪晶界的原子结构模型。结果表明,{111}孪晶形成氧八面体共面的共格倾斜孪晶界,在孪晶界处可能存在一定量的A空位且原子密度要低于孪晶体内。同时还发现两种其它特征的孪晶现象。The twin and twin boundary in PTC BaTiO_3 ceramics were studied by TEM and HREM. An atomic structure model of {111} plane twin boundary was constructed according to HREM study result, the results indicate that the {111} twin boundary is characterized by the octahedra with sharing face and is in the form of coherency tilt twin boundary which has a density less than that in twin crystal. Another two kinds of twin with specific features were also found.

关 键 词：BATIO3陶瓷 孪晶 孪晶间界 PTC型 

分 类 号：TQ174.75[化学工程—陶瓷工业]