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Ultra‐Broad Temperature Stability Obtained with Ce ‐Doped BaTiO 3 ‐Based Ceramics
Author(s) -
Wang Mingjing,
Li Lingxia,
Zhang Ning,
Liu Yaran,
Chen Junxiao
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.12577
Subject(s) - materials science , dielectric , doping , ferroelectricity , ion , analytical chemistry (journal) , ceramic , mineralogy , polarization (electrochemistry) , chemical engineering , composite material , chemistry , optoelectronics , chromatography , engineering , organic chemistry
Ce ‐doped BaTiO 3 ‐based ceramics were prepared and studied to satisfy ultra‐broad temperature stability (from −55°C to 300°C, capacitance variation rate based on C 20°C is within ±15%). The sample with 0.6 mol% CeO 2 succeeds to achieve this performance with a remarkably high ceiling temperature of 300°C. Meanwhile, the sample has good dielectric and electrical properties at room temperature (ε r = 1667, tanδ = 1.478%, ρ V = 5.9 × 10 12 Ω·cm). Ce ion can substitute for Ti ion as Ce 4+ or Ba ion as Ce 3+ . The substitution decreases the spontaneous polarization of BaTiO 3 , and then weakens the ferroelectricity of BaTiO 3 . As a result, the temperature stability of samples is improved obviously. Besides, CeO 2 addition promotes the formation of exaggerated grains, which are consisting of Ba 6 Ti 17 O 40 .