Dielectric properties of manganese-doped TiO sub(2) with different alkali-free glass contents for energy storage application

• Published in: Journal of materials science. Materials in electronics Vol. 27; no. 7; pp. 7680 - 7684
• Main Authors: Liu, Jianfeng, Zhang, Jihua, Wei, Meng, Yao, Zongying, Chen, Hongwei, Yang, Chuanren
• Format: Journal Article
• Language: English
• Published: 01.07.2016
• Subjects: Dielectric properties; Electric fields; Electronics; Glass; Glass ceramics; Manganese; Microstructure; Titanium dioxide
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-016-4753-5

The dielectric properties and microstructures of 0.05 mol% manganese (Mn)-doped TiO sub(2) with different alkali-free glass (BaO-B sub(2)O sub(3)-Al sub(2)O sub(3)-SiO sub(2)) contents were investigated. The alkali-free glass which coated Mn-doped TiO sub(2) ceramic powders was prepared by sol-gel method, all samples were sintered at 1100 degree C for 6 h. Microstructure observation indicated that the grain size greatly reduced and microstructure uniformity was improved by adding 15 wt% alkali-free glass. The alkali-free glass did not only decrease the dielectric loss (<0.01), but also significantly enhanced the frequency/temperature stability of dielectric properties. The energy density of 15 wt% glass-ceramics could achieve 1.15 J/cc with average breakdown electric field (E sub(b)) of 50.17 kV/mm, the polarization-electric field (P-E) hysteresis loops showed that glass-ceramic composites had a very low energy loss.