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Energy‐Storage Properties of 0.89 Bi 0.5 Na 0.5 TiO 3 –0.06 BaTiO 3 –0.05 K 0.5 Na 0.5 NbO 3 Lead‐Free Anti‐ferroelectric Ceramics
Author(s) -
Gao Feng,
Dong Xianlin,
Mao Chaoliang,
Liu Wei,
Zhang Hongling,
Yang Lihui,
Cao Fei,
Wang Genshui
Publication year - 2011
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/j.1551-2916.2011.04731.x
Subject(s) - ferroelectricity , dielectric , hysteresis , materials science , phase transition , analytical chemistry (journal) , natural bond orbital , electric field , ceramic , ferroelectric ceramics , capacitor , phase (matter) , mineralogy , condensed matter physics , chemistry , voltage , optoelectronics , electrical engineering , composite material , physics , density functional theory , engineering , organic chemistry , chromatography , computational chemistry , quantum mechanics
Energy‐storage properties of 0.89 Bi 0.5 Na 0.5 TiO 3 –0.06 BaTiO 3 –0.05 K 0.5 Na 0.5 NbO 3 (0.89 BNT –0.06 BT –0.05 KNN ) lead‐free ceramics were first investigated. Measurements of dielectric properties together with switching current curves indicate a rather diffuse ferroelectric ( FE ) to anti‐ferroelectric ( AFE ) phase transition when heating from 20°C to 90°C. The energy density ( W ), which was calculated from P–E hysteresis loops, increases linearly with the external electric field when E exceeds AFE ‐ FE transition field. W is independent of temperature and frequency, and maintains around 0.59 J/cm 3 under 5.6 kV/mm in the stable AFE phase region. These properties indicate that 0.89 BNT –0.06 BT –0.05 KNN ceramics might be a promising lead‐free AFE material for energy‐storage capacitor application.