Domain structure of nano BaTiO3 ceramic described by a second-order transition model

Author

Fang, Chao ; Chen, Liangyan

Author_Institution

Instn. of Electr. & Electron. Eng., Wuhan Polytech. Univ., Wuhan, China

Volume

3

fYear

2012

fDate

25-27 May 2012

Firstpage

336

Lastpage

338

Abstract

Grain size effect of nano-BaTiO₃ ceramics has been studied on the basis of Ginsburg-Landau-Devonshire thermodynamic theory. In this study, ferroelectric domain of nano BaTiO₃ ceramic has been researched by a second-order transition model, size effects of the polarization and ferroelectric-paraelectric transition temperature have been analyzed. The results pointed out that with decreasing grain size, ferroelectric-paraelectric transition has occurred and the ferroelectric critical size is 22 nm, which is consistent with the experimental data.

Keywords

barium compounds; dielectric materials; ferroelectric ceramics; titanium compounds; BaTiO₃; Ginsburg-Landau-Devonshire thermodynamic theory; domain structure; ferroelectric domain; ferroelectric-paraelectric transition; grain size effect; nanoceramic; second-order transition model; size 22 nm; Capacitors; Ceramics; Equations; Grain size; Mathematical model; Nanostructures; Temperature distribution; Phase transition; ferroelectric; size effect;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer Science and Automation Engineering (CSAE), 2012 IEEE International Conference on

Conference_Location

Zhangjiajie

Print_ISBN

978-1-4673-0088-9

Type

conf

DOI

10.1109/CSAE.2012.6272967

Filename

6272967