Fabrication of high-performance Ba0.95Ca0.05Ti0.85Zr0.15O3 ceramics by aqueous chemical coating method

被引:6
|
作者
Shen, Zhengbo [1 ]
Wang, Xiaohui [1 ]
Gong, Huiling [1 ]
Wu, Longwen [1 ]
Li, Longtu [1 ]
机构
[1] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
基金
中国国家自然科学基金;
关键词
Dielectric properties; Aqueous chemical coating; Breakdown strength; Resistance degradation; DIELECTRIC-PROPERTIES; (BA; CA)(TI; ZR)O-3; POWDERS; BCTZ;
D O I
10.1016/j.ceramint.2015.03.264
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Al2O3-coated Ba0.95Ca0.05Ti0.85Zr0.15O3 dielectric ceramics with excellent performance were fabricated by a novel aqueous chemical coating method. With this method, Al2O3 was well coated on the surface of Ba0.95Ca0.05Ti0.85Zr0.15O3 powders, resulting in homogenous microstructure, excellent dielectric and electrical properties. The specimen with an appropriate coating amount of 0.4 wt% Al2O3 exhibited the most outstanding properties. The dielectric constant at room temperature could reach similar to 13,600, with low dielectric loss (similar to 0.5%) and high insulation resistivity (similar to 6.2 x 10(11) Omega.cm). DC breakdown strength was also improved to similar to 12.5 kV/mm because of Al2O3 coating. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码:S157 / S161
页数:5
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