Mechanisms of Texture Development in Lead-Free Piezoelectric Ceramics with Perovskite Structure Made by the Templated Grain Growth Process

Toshio Kimura; Yuan Yi; Fumito Sakurai

doi:10.3390/ma3114965

Mechanisms of Texture Development in Lead-Free Piezoelectric Ceramics with Perovskite Structure Made by the Templated Grain Growth Process

Materials (Basel). 2010 Nov 22;3(11):4965-4978. doi: 10.3390/ma3114965.

Authors

Toshio Kimura¹, Yuan Yi², Fumito Sakurai³

Affiliations

¹ Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan. kimura@applc.keio.ac.jp.
² Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan. yuanyiyha@yahoo.co.jp.
³ Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan. fumitofumu@yahoo.co.jp.

Abstract

The mechanisms of texture development were examined for BaTiO₃ and a (K,Na,Li)(Nb,Ta)O₃ solid solution made by the templated grain growth method, and compared with the mechanism in Bi_0.5(Na,K)_0.5TiO₃. The dominant mechanism was different in each material; grain boundary migration in BaTiO₃, solid state spreading in Bi_0.5(Na,K)_0.5TiO₃, and abnormal grain growth in the (K,Na,Li)(Nb,Ta)O₃ solid solution. The factor determining the dominant mechanism is the degree of smoothness of surface structure at an atomic level.

Keywords: (K,Na)NbO3-based material; BaTiO3; microstructure; texture development.