摘要
系统研究了Yb-Mn-CaZrO3掺杂和Yb-Ni-CaZrO3掺杂BaTiO3陶瓷的显微结构与介电性能的关系。实验表明,Mn和Ni离子可以抑制Yb与CaZrO3向BaTiO3晶粒中的扩散,并形成晶粒的“壳-芯”复相结构。SEM和DSC研究表明,掺Ni较之掺Mn更有利于提高陶瓷材料中“壳-芯”结构的稳定性。CaZrO3的引入可提高瓷料的居里温度并改善介电温度稳定性,使上述两种瓷料系统的介电温度特性均满足X8R规范要求。
The relations between the microstructure and dielectric properties of Yb-Mn-CaZrO3-dopeded and Yb-Ni-CaZrO3-doped BaTiO3 ceramics are investigated in this paper. Experiment results indicate that the diffusion of Yb and CaZrO3 can be suppressed by Mn and Ni ions, and result in the formation of ＂core-shell＂ structure gains. It is also observed by SEM and DSC that Ni is more favorable to stabilize the ＂core-shell＂ structure in BaTiO3 ceramics, compared with Mn. The two BaTiO3 ceramics above satisfiy the X8R specification （-55℃ to 150℃, △C±15%） when CaZrO3 is incorporated in the formulations, attributed to the increase of Curie temperature and improvement of temperature characteristic.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2006年第3期132-134,143,共4页
Materials Reports
关键词
钛酸钡
X8R
介电性能
微观结构
BaTiO3, X8R, dielectric properties, microstructure
