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| Structure and Electrical Properties of Piezoelectric Ceramics Ba0.9Ca0.1Ti1-xSnxO3 Sintered with CeO2 Doping |
| YIN Qiyi, TIAN Chang an, HU Shuting, WANG Chengze, WANG Tingting,YANG Jie, JI Dongdong, LIU Yang
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| Department of Chemistry and Materials Engineering, Hefei University, Hefei 230601 |
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Abstract New lead-free piezoelectric ceramics Ba0.9Ca0.1Ti1-xSnxO3 with 0.15%(mole fraction) CeO2doping were prepared via the conventional sintering technique at 1 120 ℃ for 2 h, and the products’ microstructure and electrical properties were investigated. X-ray diffraction indicates that all the ceramics possess a pure perovskite structure with typical tetragonal symmetry, SEM micrographs suggest that the appropriate addition amount of Sn can enhance the compactness. The Sn-modified BaTiO3-based ceramics exhibit an optimum piezoelectric, dielectric and ferroelectric properties (d33=276 pC/N, kp=46%, εr=3 678, tanδ=2.4%, Pr=18.2 μC/cm2, EC=1.12 kV/mm) at room temperature while x=0.02. These excellent results demonstrate that appropriate amount of Sn can further improve the electrical properties of BaTiO3-based piezoelectric ceramics.
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Published:
Online: 2018-05-08
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