Ferroelectric transition of Aurivillius compounds Bi5Ti3FeO15 and Bi6Ti3Fe2O18
Ferroelectric transition of Aurivillius compounds Bi5Ti3FeO15 and Bi6Ti3Fe2O18
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DOI：
10.1063/1.3447372
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发表时间：
2010-05-31
影响因子：
4
通讯作者：
Liang, J. K.
中科院分区：
文献类型：
--
作者：
Li, J. -B.;Huang, Y. P.;Liang, J. K.
采用固相反应法合成了单相Bi 5 Ti 3FeO 15和Bi 6 Ti 3Fe 2 O 18陶瓷。通过差示扫描量热法、高温x射线衍射和随温度变化的介电测量研究了化合物的铁电转变。两种化合物均观察到两种固态结构转变，一种是正交相转变。另一个是伴随着四方晶相的突然晶格膨胀，Bi 5 Ti 3FeO 15在约1110 K，Bi 6 Ti 3Fe 2 O 18在约1090 K。(C)2010年美国物理学会。[doi：10.1063/1.3447372]
Single-phase Bi5Ti3FeO15 and Bi6Ti3Fe2O18 ceramics have been synthesized by solid state reaction. The ferroelectric transition of the compounds was studied by differential scanning calorimetry, high-temperature x-ray diffraction, and temperature-dependent dielectric measurements. Two solid-state structural transitions were observed in both compounds, one is the orthorhombic. tetragonal transition (ferroelectric transition) at 1021 K for Bi5Ti3FeO15 and 973 K for Bi6Ti3Fe2O18, and the other is accompanied by an abrupt lattice expansion of the tetragonal phase at about 1110 K for Bi5Ti3FeO15 and about 1090 K for Bi6Ti3Fe2O18. (C) 2010 American Institute of Physics. [doi:10.1063/1.3447372]