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Dielectric, Ferroelectric, and Piezoelectric Properties of BiFeO 3 –BaTiO 3 Ceramics
Author(s) -
Wei Yongxing,
Wang Xiaotao,
Zhu Jintao,
Wang Xiaoli,
Jia Jiangjiang
Publication year - 2013
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12475
Subject(s) - dielectric , materials science , ferroelectricity , ceramic , piezoelectricity , mineralogy , trigonal crystal system , piezoelectric coefficient , electrical resistivity and conductivity , solid solution , analytical chemistry (journal) , polarization (electrochemistry) , perovskite (structure) , hysteresis , crystal structure , condensed matter physics , crystallography , composite material , chemistry , metallurgy , physics , optoelectronics , chromatography , quantum mechanics
Perovskite solid solution ceramics of (1 − x ) BiFeO 3 – x BaTiO 3 (1 − x ) BF – x BT , 0.2 ≤ x ≤ 0.45) with high electrical resistivity were prepared by solid‐state reaction method. Actual ferroelectric hysteresis loops and temperature dependence of dielectric constant of the ceramics were obtained. Ceramics of 0.7 BF –0.3 BT with small rhombohedral distortion show highest remnant polarization ( P r = 26.0 μC/cm 2 ) and piezoelectric coefficient ( d 33 = 134 pC/N). Compositions with pseudo‐cubic symmetry (intermediate phases) show relaxor‐like dielectric anomaly. The values of P r and d 33 decrease with increasing BT content, from 24.8 μC/cm 2 and 104 pC/N for 0.65 BF –0.35 BT to 8.2 μC/cm 2 and 5 pC/N for 0.55 BF –0.45 BT .