Structure Evolution and Electrical Properties of Y3+‐Doped Ba1−xCaxZr0.07Ti0.93O3 Ceramics
Structure Evolution and Electrical Properties of Y3+‐Doped Ba1−xCaxZr0.07Ti0.93O3 Ceramics
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DOI：
10.1111/jace.12900
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发表时间：
2014-07
影响因子：
3.9
通讯作者：
Hairui Liu;Qiang Li;Yuanyuan Li;Nengneng Luo;J. Shim;Jinghan Gao;Q. Yan;Yiling Zhang;Xiangcheng Chu
中科院分区：
文献类型：
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作者：
Hairui Liu;Qiang Li;Yuanyuan Li;Nengneng Luo;J. Shim;Jinghan Gao;Q. Yan;Yiling Zhang;Xiangcheng Chu
制备了Y3+掺杂的Ba 1 −xCaxZr0.07Ti0.93O3（x = 0.05、0.10和0.15）无铅压电陶瓷。采用X射线衍射、拉曼光谱、阻抗分析、铁电测试系统和单极应变测量等手段，系统研究了所制备陶瓷的组成和温度对结构相演变和电学性能的影响。x = 0.10的组合物表现出363 pC/N的良好压电常数d33、257 V/mm的矫顽场Ec、14.5 μC/cm 2的反射极化Pr和109°C的居里温度Tm。引入高分辨率X射线衍射来指示正交相的存在。x = 0.10的匡威压电常数d33* 在50°C ~ 110°C范围内表现出较好的温度稳定性。这意味着降低正交-四方相转变温度是扩大其工作温度范围的有效途径。
Lead free piezoelectric ceramics of Y3+-doped Ba1−xCaxZr0.07Ti0.93O3 with x = 0.05, 0.10, and 0.15 were prepared. Composition and temperature-dependent structural phase evolution and electrical properties of as-prepared ceramics were studied systematically by X-ray diffraction, Raman spectroscopy, impedance analyzer, ferroelectric test system, and unipolar strain measurement. Composition with x = 0.10 performs a good piezoelectric constant d33 of 363 pC/N, coercive field Ec of 257 V/mm, remanent polarization Pr of 14.5 μC/cm2, and a Curie temperature Tm of 109°C. High-resolution X-ray diffraction was introduced to indicate presence of orthorhombic phase. Converse piezoelectric constant d33* of x = 0.10 composition performed better temperature stability in the range from 50°C to 110°C. That means decreasing orthorhombic–tetragonal phase transition temperature could be an effective way to enlarge its operating temperature range.