Study on the dielectric properties of 0.75Pb（Mg1/3Nb2/3）O3-0.25PbTiO3 ceramic under hydrostatic pressure | Zendy

Chonghui Zhang | Zendy; Zhuo Xu | Zendy; Junjie Gao | Zendy; Binke Wang | Zendy

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Study on the dielectric properties of 0.75Pb（Mg1/3Nb2/3）O3-0.25PbTiO3 ceramic under hydrostatic pressure

Author(s) -

Chonghui Zhang,

Zhuo Xu,

Junjie Gao,

Binke Wang

Publication year - 2009

Publication title -

acta physica sinica

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.

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