BiScO3 Doped (Na0.5K0.5)NbO3 Lead-Free Piezoelectric Ceramics |
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| Authors: | Xueyi Sun Jun Chen Ranbo Yu Ce Sun Guirong Liu Xianran Xing Lijie Qiao |
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| Affiliation: | Department of Physical Chemistry, University of Science and Technology Beijing, Beijing 100083, China;
State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;
Key Laboratory of Environmental Fracture, Ministry of Education of China, Beijing 100083, China |
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| Abstract: | Lead-free potassium sodium niobate-based piezoelectric ceramics (1? x )(Na0.5K0.5)NbO3– x BiScO3 (KNN–BS) ( x =0～0.05) have been prepared by an ordinary sintering process. Single perovskite phase of KNN–BS exhibits an orthorhombic symmetry at x <0.015 and pseudocubic symmetry at x >0.02, separating by a MPB at 0.015≤ x ≤0.02. Piezoelectric and ferroelectric properties are significantly enhanced in the MPB, which are as follows: piezoelectric constant d 33=203 pC/N, planar coupling coefficient k p=0.36, remnant polarization P r=24.4 μC/cm2. These solid solution ceramics look promising as a potential lead-free candidate materials. |
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