Effect of K2O content on breakdown strength and energy-storage density in K2O-BaO-Nb2O5-SiO2 glass-ceramics. Issue 5 (1st April 2017)

• Record Type: Journal Article
• Authors: Wang, Haitao; Liu, Jinhua; Zhai, Jiwei; Shen, Bo; Pan, Zhongbin; Yang, Ke; Liu, Jingran
• Is Part Of: Ceramics international. Volume 43:Issue 5(2017)
• Page Start: 4183
• Page End: 4187
• Publication Date: 2017-04-01
• Subjects: Glass-ceramic -- Energy storage density -- Breakdown strength -- Glass network; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.12.042
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Phase evolution, dielectric properties, breakdown strength, and energy-storage performance were studied by varying K2 O content in K2 O-BaO-Nb2 O5 -SiO2 glass-ceramics. It was found that dielectric loss with the increase of K2 O content increases owing to the un-crystallized K2 O into the glass network, while dielectric breakdown strength firstly increases and then decreases due to the competition between two physical mechanisms, i.e., interfacial polarization and bridging-oxygen bond broken by the non-bridging oxygen ions. With the increase of K2 O content, energy-storage density firstly increased up to 12.06±0.69 J/cm 3 with a high breakdown strength of 1973 kV/cm, and then decreased. Also, the discharged efficiency is obtained as a high value of 92% from P-E hysteresis loops.