Investigation of raw-material pre-milling effection physical properties of BaTiO3 piezoelectric ceramics

SUN Dandan; ZHANG Jialiang; WU Yanqing; ZHANG Zhongqiu; LIU Dakang

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Investigation of raw-material pre-milling effection physical properties of BaTiO3 piezoelectric ceramics

SUN Dandan,ZHANG Jialiang * #,WU Yanqing,ZHANG Zhongqiu,LIU Dakang

School of physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, P. R. China 250100

*Correspondence author

#Submitted by

Subject:

Funding: Specialized Research Fund for the Doctoral Program of Higher Education Grant （No.20130131110006）

Opened online:19 October 2016

Accepted by: none

Citation: SUN Dandan,ZHANG Jialiang,WU Yanqing.Investigation of raw-material pre-milling effection physical properties of BaTiO3 piezoelectric ceramics[OL]. [19 October 2016] http://en.paper.edu.cn/en_releasepaper/content/4706769

This paper reports our investigation result about the pre-milling treatment effect of BaCO3 powder on physical properties of the resultant BaTiO3 ceramics prepared by conventional solid-state reaction. BaCO3 powder usually consists of large rod-shaped particles, which cannot be easily broken up into fine ones when ball-milled together with TiO2 powder. This may lead to chemical compositional non-uniformity and large particle sizes of the subsequently synthesized BaTiO3 powder, and may eventually affect microstructure and piezoelectric properties of the resultant BaTiO3 ceramics. Our study showed that an additional ball-milling treatment of BaCO3 powderbefore being mixed with TiO2 powder is an effective mean to get good-quality BaTiO3 fine powder. In such a way, we fabricated a series of small-grained dense BaTiO3 ceramics with significantly high piezoelectric coefficient d33. A much enhanced d33 value of 470 pC/N was achieved in comparison to the previous maximum one of 410 pC/N for those BaTiO3 ceramics formed through ordinary ceramic procedure.

Keywords:BaTiO3; piezoelectric ceramics; pre-milling of raw material; microstructure

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