Premium
A Phenomenological Model on Phase Transitions in Nanocrystalline Barium Titanate Ceramic
Author(s) -
Sun Tieyu,
Wang Xiaohui,
Wang Han,
Zhang Xiaoquan,
Cheng Zhida,
Sun Chang Q.,
Li Longtu
Publication year - 2010
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2010.03900.x
Subject(s) - barium titanate , materials science , phenomenological model , ferroelectricity , nanocrystalline material , phase transition , ceramic , condensed matter physics , grain size , phase (matter) , ferroelectric ceramics , thermodynamics , composite material , nanotechnology , dielectric , physics , optoelectronics , quantum mechanics
An innovative method is presented to estimate the size effect on the ferroelectric phase transitions in the barium titanate ceramic system. The method is based on the phenomenological thermodynamic theory with additional stress led by surface bond contraction. Two symmetry‐breaking factors are introduced to correct the stress. This method has enabled us to predict the changing trends in phase transitions and the critical grain size for the disappearance of ferroelectric phase, which is beyond the prediction of existing models.