Enhanced dielectric breakdown strength in TiO2-SiO2-Al2O3 based ceramics prepared through hot-press assisted liquid phase sintering

doi:10.1016/j.jeurceramsoc.2019.07.023

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	Enhanced dielectric breakdown strength in TiO2-SiO2-Al2O3 based ceramics prepared through hot-press assisted liquid phase sintering
	Fang, Zhuoqun; Chen, Ying; Li, Xin; Huang, Wei; Xia, Liansheng; Shen, Yi; Wang, Genshui; Dong, Xianlin
	2019-12-01
Source Publication	JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN	0955-2219
Volume	39 Issue:15 Pages:4817
Subtype	Article
Abstract	Linear dielectric ceramics have received much attention due to high power density, fast discharge speed and ultralow dielectric loss, which are expected as promising candidates for the pulsed power system applications. However, their relatively low dielectric breakdown strength usually cannot meet the requirements of practical application. In this work, we adopt hot-press sintering method to enhance the dielectric breakdown strength of the TiO2-SiO2-Al2O3 based ceramics, and the dielectric breakdown strength reaches 77.5 kV/mm, which is 1.8 times as large as samples prepared by conventional sintering method. The effect of different sintering methods on microstructure, dielectric properties and dielectric breakdown strength is investigated. The improvement of dielectric breakdown strength can be ascribed to improved bulk density, smaller grain size, and reduced reduction of Ti4+ to Ti3+, associated with the applied external pressure and lower sintering temperature. Eventually, large power density (18.20 MW/cm(3)) is obtained in pulse overdamped discharge circuit. Meanwhile, the stored energy is also released in a short time (about 11.3 ns to release 90% of saturated energy density value).
Keyword	Linear dielectric ceramics Hot-press sintering Microstructure Dielectric breakdown strength Charge-discharge performance
DOI	10.1016/j.jeurceramsoc.2019.07.023
Language	英语
WOS Research Area	Materials Science
Publisher	ELSEVIER SCI LTD
Citation statistics	Cited Times:3[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/26711
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Fang, Zhuoqun,Chen, Ying,Li, Xin,et al. Enhanced dielectric breakdown strength in TiO2-SiO2-Al2O3 based ceramics prepared through hot-press assisted liquid phase sintering[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2019,39(15):4817.
APA	Fang, Zhuoqun.,Chen, Ying.,Li, Xin.,Huang, Wei.,Xia, Liansheng.,...&Dong, Xianlin.(2019).Enhanced dielectric breakdown strength in TiO2-SiO2-Al2O3 based ceramics prepared through hot-press assisted liquid phase sintering.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,39(15),4817.
MLA	Fang, Zhuoqun,et al."Enhanced dielectric breakdown strength in TiO2-SiO2-Al2O3 based ceramics prepared through hot-press assisted liquid phase sintering".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 39.15(2019):4817.

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