Relationship between structure and properties in high-temperature Bi(Al0.5Fe0.5)O3-PbTiO3 piezoelectric ceramics |
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| Authors: | Zhonghua Yao Liyuan PengHanxing Liu Hua HaoMinghe Cao Zhiyong Yu |
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| Affiliation: | a Key Laboratory of Advanced Technology for Specially Functional Materials, Ministry of Education, Wuhan University of Technology, Wuhan 430070, PR China
b State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China |
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| Abstract: | Ceramic samples of xBi(Al0.5Fe0.5)O3-(1 − x)PbTiO3 (BAF-PT, x = 0.05-0.5) solid solutions were fabricated using the conventional solid state reaction method. X-ray diffraction analysis revealed that all compositions can form single perovskite phase with tetragonal symmetry. The relationship between the tetragonal lattice parameters, tetragonality c/a, cell volume, and ferro-piezoelectric characterization as a function of x was systematically investigated. The BAF modification can effectively improve the poling condition at a proper BAF content. A combination of piezoelectric constant of d33 (50-60 pC/N), electromechanical planar coupling coefficients of kp (20.3-22.5%), and high Curie temperature Tc (>478 °C) suggested that BAF-PT could be a good candidate for high-temperature piezoelectric applications. |
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| Keywords: | Ceramics X-ray diffraction Dielectric properties Piezoelectric properties BAF-PT ceramics |
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