Journal of Inorganic Materials ›› 2017, Vol. 32 ›› Issue (6): 615-620.doi: 10.15541/jim20160489

• Orginal Article • Previous Articles     Next Articles

Raw-material Pre-milling on Physical Property of BaTiO3 Piezoelectric Ceramics

Dan-Dan SUN(), Jia-Liang ZHANG(), Yan-Qing WU, Zhong-Qiu ZHANG, Da-Kang LIU   

  1. School of physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
  • Received:2016-08-29 Revised:2016-10-09 Online:2017-06-20 Published:2017-05-27
  • About author:SUN Dan-Dan. E-mail: sdd1133556@163.com
  • Supported by:
    Specialized Research Fund for the Doctoral Program of Higher Education (20130131110006)

Abstract:

BaCO3 powder usually consists of large rod-shaped particles, which can not 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 through the calcination and the secondary ball-milling procedure, and may eventually affect the microstructure and the piezoelectric properties of resultant BaTiO3 ceramics. Effects of the pre-milling treatment of BaCO3 powder on physical properties of the resultant BaTiO3 ceramics prepared by conventional solid-state reaction were investigated. The results show that an additional ball-milling treatment of BaCO3 powder before being mixed with TiO2 powder can remarkably reduce the size of the rod-like particles, which is an effective way to get good-quality BaTiO3 fine powder. In such a way, a series of small-grained dense BaTiO3 ceramics are fabricated with significantly high piezoelectric coefficient d33. The BaTiO3 ceramics were prepared with the BaCO3 powders ball-milled for different time before mixing with raw TiO2 powder. Physical properties of the resultant BaTiO3ceramics, including piezoelectric properties, dielectric properties, ferroelectric properties, and microstructure were investigated. A much enhanced d33 value of 470 pC/N was achieved for the BaTiO3 ceramics prepared with the BaCO3 powders ball-milled for 8 h, in comparison to the maximum value of 410 pC/N for those BaTiO3 ceramics prepared with un-ball-milled BaCO3 powders.

Key words: BaTiO3, piezoelectric ceramics, pre-milling of raw material, microstructure

CLC Number: 

  • TQ174