Enhanced sintering and nonlinear dielectric properties of Ba0.6Sr0.4TiO3 ceramics with a small amount of lithium additive

Zhang Xiao-Fei; Xie Xiao-Bin; Xu Qing; Chen Min; Chen Dong-Chu; Huang Duan-Ping; Zhang Feng

doi:10.2298/SOS1903295Z

Science of Sintering (Jan 2019)

Enhanced sintering and nonlinear dielectric properties of Ba0.6Sr0.4TiO3 ceramics with a small amount of lithium additive

Zhang Xiao-Fei,
Xie Xiao-Bin,
Xu Qing,
Chen Min,
Chen Dong-Chu,
Huang Duan-Ping,
Zhang Feng

Affiliations

Zhang Xiao-Fei: School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, People’s Republic of China + School of Mathematics and Physics, Hubei Polytechnic University, Huangshi, People’s Republic of China
Xie Xiao-Bin: School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, People’s Republic of China + School of Materials Science and Energy Engineering, Foshan University, Foshan, People’s Republic of China
Xu Qing: School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, People’s Republic of China
Chen Min: School of Materials Science and Energy Engineering, Foshan University, Foshan, People’s Republic of China
Chen Dong-Chu: School of Materials Science and Energy Engineering, Foshan University, Foshan, People’s Republic of China
Huang Duan-Ping: School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, People’s Republic of China
Zhang Feng: School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, People’s Republic of China

DOI: https://doi.org/10.2298/SOS1903295Z
Journal volume & issue: Vol. 51, no. 3
pp. 295 – 307

Abstract

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The powders with the nominal compositions of Ba0.6Sr0.4TiO3+x wt.% Li2CO3 (x=0 and x=1.0) were synthesized by a citrate precursor method. The sintering behavior, structure and dielectric properties of the ceramic specimens were investigated. Compared with the lithium-free specimen (x=0), the lithium-added specimen (x=1.0) showed appreciably enhanced sintering properties, achieving a relative density of 96.0% after sintering at 900°C. The enhanced sintering properties were related to a liquid-phase sintering mechanism. The origin of the liquid-phase was explained. The effects of the liquid-phase on the densification progress of the lithium-added specimen in different sintering stages were elucidated. The lithium addition was found to be beneficial to the nonlinear dielectric properties. The ceramic specimen with x=1.0 exhibited a figure-of-merit of 106 under a bias electric field of 20 kV/cm, higher by ~60% than the value (67) for the specimen with x=0.

Published in Science of Sintering

ISSN: 0350-820X (Print); 1820-7413 (Online)
Publisher: International Institute for the Science of Sintering, Beograd
Country of publisher: Serbia
LCC subjects: Technology: Chemical technology
Website: http://www.doiserbia.nb.rs/journal.aspx?issn=0350-820X

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