Open AccessGrain boundary effects on piezoelectric properties of the core–shell-structured BaTiO3@TiO2 ceramics
Author(s) -
Xixi Li,
Zhonghua Yao,
Juan Xie,
Zongxin Li,
Hua Hao,
Minghe Cao,
Asmat Ullah,
Atta Ullah,
Abdul Manan,
Hanxing Liu
Publication year - 2018
Publication title -
journal of advanced dielectrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.38
H-Index - 13
eISSN - 2010-135X
pISSN - 2010-1368
DOI - 10.1142/s2010135x18500443
Subject(s) - materials science , grain boundary , ferroelectricity , piezoelectricity , ceramic , annealing (glass) , composite material , phase boundary , coating , grain boundary strengthening , grain size , ferroelectric ceramics , barium titanate , mineralogy , microstructure , phase (matter) , dielectric , optoelectronics , chemistry , organic chemistry
Grain boundary effect on BaTiO 3 has been widely investigated for several decades. However, all of them tailored the grain boundary by grain size of BaTiO 3 . In this case, a direct way was introduced to modify the grain boundary by coating technique to investigate the role of grain boundary in ferroelectric materials. Nonferroelectric phase TiO 2 was employed to investigate grain boundary effects on the electrical properties of BaTiO 3 piezoelectric ceramics. TiO 2 coating can result in the reduction of piezoelectric and ferroelectric properties and the annealing process in oxygen can increase piezoelectric behavior of pure BaTiO 3 due to valence state of Ti ions while that remains for Ti-modified composition possibly due to the increased grain boundary effect by impedance analysis. Compared with ferroelectric grain, grain boundary plays a critical role to impact the electrical properties of perovskite-type ferroelectric materials.