Title :
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
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;
Conference_Titel :
Computer Science and Automation Engineering (CSAE), 2012 IEEE International Conference on
Conference_Location :
Zhangjiajie
Print_ISBN :
978-1-4673-0088-9
DOI :
10.1109/CSAE.2012.6272967
