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c / a Ratio‐Dependent Energy‐Storage Density in (0.9−x) Bi 0.5 Na 0.5 TiO 3 –xBaTiO 3 –0.1K 0.5 Na 0.5 NbO 3 Ceramics
Author(s) -
Gao Feng,
Dong Xianlin,
Mao Chaoliang,
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.1551-2916.2011.04912.x
Subject(s) - ceramic , sintering , materials science , analytical chemistry (journal) , hysteresis , natural bond orbital , mineralogy , diffraction , physics , chemistry , optics , condensed matter physics , composite material , density functional theory , quantum mechanics , chromatography
The (0.9−x) Bi 0.5 Na 0.5 TiO 3 –xBaTiO 3 –0.1K 0.5 Na 0.5 NbO 3 [ BNBKN(x) , x = 0.060, 0.063, 0.066, and 0.069] ceramics were fabricated by the conventional sintering technique. The P – E hysteresis loops measured under 5 kV/mm at room temperature show that the BNBKN(0.063) ceramics obtain the maximum ( P s− P r) value of 20.6 μC/cm 2 and the largest energy‐storage density W of 0.424 J/cm 3 . In addition, calculation from the X‐ray diffraction results shows that the BNBKN(0.063) ceramics are featured with the largest c / a ratio of 0.70887. The W is observed to increase with the increase of the c / a ratio in the BNBKN( x ) ceramics. The c / a ratio can be regarded as a significant factor for W in the BNBKN( x ) ceramics.
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