Revealing the role of heat treatment in enhancement of electrical properties of lead-free piezoelectric ceramics
Revealing the role of heat treatment in enhancement of electrical properties of lead-free piezoelectric ceramics
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DOI：
10.1063/1.4991492
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发表时间：
2017-07
影响因子：
3.2
通讯作者：
Sangwook Kim;G. Khanal;S. Ueno;C. Moriyoshi;Y. Kuroiwa;S. Wada
中科院分区：
文献类型：
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作者：
Sangwook Kim;G. Khanal;S. Ueno;C. Moriyoshi;Y. Kuroiwa;S. Wada
研究了0.80BiFeO3-0.20BaTiO3无铅陶瓷的原始样品、退火样品和淬火样品的结构和电学性能。用结构精修方法研究的晶体结构显示出所有样品的菱面体结构。铁电和压电性能的显著增强归因于热处理后在样品中诱导的晶格应变的弛豫。从最终的结构细化结果计算的键长揭示了热处理后的A-O键长的增量，而B-O键长保持在所有的原始，退火，淬火样品表明在材料系统的A-位点的晶格应变的具体影响。
The structural and electrical properties of the virgin, annealed, and quenched samples of 0.80BiFeO3–0.20BaTiO3 lead-free ceramics were investigated. The crystal structures investigated with the structure refinement method exhibited a rhombohedral structure for all the samples. The significant enhancement of ferroelectric and piezoelectric properties is ascribed to the relaxation of the lattice strain induced in the samples after the heat treatment. The bond-length calculated from the final structure refinement results revealed the increment of the A-O bond-length after the heat treatment, while the B-O bond-length was maintained in all the virgin, annealed, and quenched samples suggesting the specific influence of the lattice strain at the A-site of the material system.