期刊
CERAMICS INTERNATIONAL
卷 48, 期 2, 页码 2377-2384出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.10.018
关键词
Multilayer ceramic capacitor; BaTiO3; Bi2O(3); Y2O3; MgO; X8R
资金
- Key-Area Research and Development Program of Guangdong Province [2019B010937001]
The Bi2O3, Y2O3, and MgO co-doped BaTiO3 (BT)-based X8R ceramics were successfully synthesized for the first time. The effects of different dopants on the dielectric properties were investigated, leading to the generation of a core-shell microstructure.
Bi2O3, Y2O3 and MgO co-doped BaTiO3 (BT)-based X8R ceramics were synthesized successfully for the first time. The effects of the sintering temperature and Bi2O3, Y2O3 and MgO dopants on the dielectric properties were investigated systematically. Bi2O3 doping can increase the Curie temperature (T-c), but reduces the overall dielectric permittivity. On the other hand, Y2O3 doping is beneficial to the formation of core-shell microstructure and the increase of T-c, whereas MgO can prevent excessive Y2O3 from diffusing into grain core, and thereby further contributes to the generation of the core-shell microstructure. The generation of the typical core-shell microstructure was confirmed and investigated in detail by using transmission electron microscopy (TEM). It is argued that the synergistic effects of Bi2O3, Y2O3 and MgO co-doping in terms of the formation of the core-shell structure and the increase of T-c, can help improve the temperature stability of the dielectric permittivity effectively. Increasing the sintering temperature leads to an increase in the grain size, which in turn leads to an increase in the overall dielectric permittivity due to the grain size effect.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据