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Composition‐dependent microstructure and electrical property of (1− x )SBN‐ x BNBT solid solutions
Author(s) -
He XiaoJuan,
Xie ZhongShuai,
Yuan Xin,
Li Ling,
Huang DaFang,
Tao ChunWei,
Wang RuiXue,
Hao Jigong,
Yuan Guoliang,
Zhang ShanTao
Publication year - 2020
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.17424
Subject(s) - solid solution , ferroelectricity , dielectric , materials science , microstructure , analytical chemistry (journal) , grain size , ceramic , mineralogy , crystallography , chemistry , composite material , metallurgy , optoelectronics , chromatography
In this study, (1− x )Sr 0.75 Ba 0.25 Nb 2 O 6 ‐ x [0.94Bi 0.5 Na 0.5 TiO 3 ‐0.06BaTiO 3 ] solid solution ceramics were prepared and investigated. The length‐diameter ratio of pillar‐like grain increased with increase in x , reaching maximum value of 10.5 at average length of 1.36 μm and diameter of 0.13 μm for x = 0.20. The maximum dielectric constant, temperature corresponding to the maximum dielectric constant, and saturated polarization decreased, respectively, from 507, 36°C, and 3.2 μC/cm 2 for x = 0 to 365, −61°C, and 2.0 μC/cm 2 fort x = 0.10, and then increased to 1167, 43°C, and 5.5 μC/cm 2 for x = 0.20. These results indicate the competitive effects of B‐site Ti 4+ and A‐site Ba 2+ on ferroelectricity.