Open AccessStudy on the dielectric properties of 0.75Pb（Mg1/3Nb2/3）O3-0.25PbTiO3 ceramic under hydrostatic pressure
Author(s) -
Chonghui Zhang,
Chao Wang,
Junjie Gao,
Binke Wang
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.6500
Subject(s) - dielectric , materials science , hydrostatic pressure , ceramic , phase transition , ferroelectricity , relaxation (psychology) , hydrostatic equilibrium , condensed matter physics , phase (matter) , perovskite (structure) , thermodynamics , composite material , chemistry , crystallography , optoelectronics , physics , quantum mechanics , psychology , social psychology , organic chemistry
The dielectric properties of 0.75PbMg1/3Nb2/3O3-0.25PbTiO3 PMN-25PT ceramic under hydrostatic pressure and pressure-induced phase transition were investigated. PMN-25PT ceramic is pure perovskite with weak relaxation at 1 bar. With increasing hydrostatic pressurethe temperatureTmof top dielectric constant decreases/+{dTm}/-{dP}≈-4℃/kbarfrequency dispersion and phase transition diffuse increasesremnant polarization decreased continuously. The hydrostatic pressure dependence of dielectric constant ε is similar to the temperature dependence of dielectric constant. The relax ferroelectric-paraelectric RFE-PE phase transition was induced by hydrostatic pressure and the transition was gradual change process with stronger relaxor behavior than by temperature-induced.