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Phase structure and electrical properties of 0.8Pb(Mg 1/3 Nb 2/3 )O 3 –0.2PbTiO 3 relaxor ferroelectric ceramics prepared by the reaction‐sintering method
Author(s) -
Ding Chenlu,
Fang Bijun,
Du Qingbo,
Zhou Limin
Publication year - 2010
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200925377
Subject(s) - materials science , ceramic , dielectric , sintering , coercivity , ferroelectricity , relative density , analytical chemistry (journal) , hysteresis , perovskite (structure) , piezoelectricity , polarization (electrochemistry) , mineralogy , phase (matter) , condensed matter physics , composite material , crystallography , physics , optoelectronics , chemistry , chromatography , quantum mechanics
Phase pure perovskite 0.8Pb(Mg 1/3 Nb 2/3 )O 3 –0.2PbTiO 3 (0.8PMN–0.2PT) ferroelectric (FE) ceramics were prepared by the reaction‐sintering method at a sintering temperature range of 1200–1250 °C. The sintered ceramics exhibit large relative density, where the 0.8PMN–0.2PT ceramics sintered at 1250 °C possess the largest value of relative density, reaching 99.56% of the theoretical density. All the sintered 0.8PMN–0.2PT ceramics exhibit broad, diffused, and frequency‐dependent dielectric response peaks at around 80 °C and saturated and symmetric P – E hysteresis loops. The 0.8PMN–0.2PT ceramics exhibit excellent electrical properties, where the value of dielectric constant maximum ε m is 35 750 at 1 kHz, the remanent polarization P r is 33.01 µC/cm 2 , the coercive field E c is 2.79 kV/cm, and the piezoelectric constant d 33 is 259 pC/N.