Fabrication of high-performance Ba0.95Ca0.05Ti0.85Zr0.15O3 ceramics by aqueous chemical coating method. (July 2015)

• Record Type: Journal Article
• Authors: Shen, Zhengbo; Wang, Xiaohui; Gong, Huiling; Wu, Longwen; Li, Longtu
• Is Part Of: Ceramics international. Volume 41(2015)Supplement 1
• Page Start: S157
• Page End: S161
• Publication Date: 2015-07
• Subjects: C. Dielectric properties -- Aqueous chemical coating -- Breakdown strength -- Resistance degradation; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.03.264
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Al2 O3 -coated Ba0.95 Ca0.05 Ti0.85 Zr0.15 O3 dielectric ceramics with excellent performance were fabricated by a novel aqueous chemical coating method. With this method, Al2 O3 was well coated on the surface of Ba0.95 Ca0.05 Ti0.85 Zr0.15 O3 powders, resulting in homogenous microstructure, excellent dielectric and electrical properties. The specimen with an appropriate coating amount of 0.4 wt% Al2 O3 exhibited the most outstanding properties. The dielectric constant at room temperature could reach ~13, 600, with low dielectric loss (~0.5%) and high insulation resistivity (~6.2×10 11 Ω· cm). DC breakdown strength was also improved to ~12.5 kV/mm because of Al2 O3 coating.