Open AccessEnhanced piezoelectric properties of (Ba0.3Bi0.7)(Mg0.05Fe0.6Ti0.35)O3piezoelectric ceramics with high Curie temperature
Author(s) -
Ichiro Fujii,
Ryuta Mitsui,
Kouichi Nakashima,
Satoshi Wada
Publication year - 2014
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/s2010135x14500052
Subject(s) - materials science , font , ceramic , calcination , dielectric , bismuth , analytical chemistry (journal) , composite material , metallurgy , chemistry , optoelectronics , biochemistry , chromatography , catalysis , computer science , operating system
( Ba 0.3 Bi 0.7 )( Mg 0.05 Fe 0.6 Ti 0.35 ) O 3 ceramics were either doped with vanadium or sintered in calcined powder with the same composition. Compared to an undoped ceramic sintered without the calcined powder, both ceramics showed reduced leakage current densities (lower than 1 × 10 -7 A/cm 2 ) and absence of dielectric relaxation behaviors observed in frequency- and temperature-dependent dielectric measurements. The Curie temperatures of both samples were higher than 460°C. The maximum field-induced strain over the applied field, S max /E max , of 366 pm/V of the undoped ceramic sintered without the calcined powder increased to 455 and 799 pm/V for the V-doped ceramics and the ceramics sintered with the calcined powder, respectively. The increase was related to a reduced concentration of bismuth vacancy–oxygen vacancy defect dipoles.