期刊
APPLIED PHYSICS LETTERS
卷 96, 期 22, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3447372
关键词
aluminium compounds; annealing; energy gap; flash memories; silicon compounds
资金
- National Natural Science Foundation of China [50872148]
- National Basic Research Program of China [2007CB925003]
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]
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