Enhanced Piezoelectric Properties of (Ba1−xCax)(Ti0.92Sn0.08)O3 Lead‐Free Ceramics |
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| Authors: | Li‐Feng Zhu Bo‐Ping Zhang Xiao‐Kun Zhao Lei Zhao Peng‐Fei Zhou Jing‐Feng Li |
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| Affiliation: | 1. School of Materials Science and Engineering, University of Science and Technology Beijing, , Beijing, 100083 China;2. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, , Beijing, 100084 China |
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| Abstract: | (Ba1?xCax)(Ti0.92Sn0.08)O3 (x = 0.00–0.06 mol) ceramics with a high relative density over 96% were prepared by a conventional sintering method at 1480°C. At room temperature, a polymorphic phase transition from orthorhombic phase to tetragonal phase was confirmed by the XRD patterns in the composition range of 0.04 ≤ x ≤ 0.06. A high piezoelectric coefficient d33 up to 568 pC/N was obtained at x = 0.05 mol, which is higher than the other component of (Ba,Ca)(Ti,Sn)O3 system. At the same time, the corresponding planar electromechanical coupling factor kp, converse piezoelectric coefficient dS/dE, and dielectric constant εr reach 47.7%, 1013 pm/V, and 23000, respectively. These results indicate that the (Ba,Ca)(Ti,Sn)O3 ceramics are a promising candidate to replace for the lead‐based piezoelectric materials. |
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