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Effect of External Electric Field on the Grain‐Growth Behavior of Barium Titanate
Author(s) -
Jin HongRi,
Yoon SeokHyun,
Lee JongHeun,
Lee JeHun,
Hwang g M.,
Kim DohYeon,
Han JooHwan
Publication year - 2004
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.1551-2916.2004.01747.x
Subject(s) - barium titanate , grain boundary , materials science , grain growth , doping , acceptor , electric field , condensed matter physics , polarization (electrochemistry) , penetration (warfare) , ceramic , mineralogy , grain size , metallurgy , chemistry , microstructure , optoelectronics , physics , quantum mechanics , operations research , engineering
The effect of an external electric field on the grain‐growth behavior of acceptor Mg‐doped, undoped, and donor Nb‐doped BaTiO 3 ceramics was investigated. The acceptor‐doped and undoped specimens showed enhanced grain growth at the positive‐biased region. On the other hand, for the highly donor‐doped specimens, grain growth was enhanced in the negative‐biased region. The results have been explained in terms of defect polarization and the consequent change in the boundary potential. It has been suggested that liquid penetration into grain boundaries is critically dependent on the boundary potential.