SrBi2-xDyxNb2O9(x=0, 0.03, 0.05, 0.07) ceramics were prepared by solid state reaction method, and their microstructure, electrical and temperature stability properties were systematically investigated. It is found that Dy-doping does not change the phase structure of SrBi2Nb2O9. With the increasing of the Dy3+ content, the microstructures of the SrBi2-xDyxNb2O9 ceramics have no significant change. The remnant polarization (Pr) increases firstly and then decreases, reaching the maximum value at x=0.01, while the coercive field (Ec) decreases gradually. Furthermore, the Curie temperature decreases from 444°C to 427°C with the increase of the Dy3+ content. These results can be related to the lattice distortion caused by Dy-doping. The optimum electrical properties can be obtained at x=0.03 as 2Pr=16.4 μC/cm2, Ec=58 kV/cm, and Tc = 436 °C, showing good temperature stability for high temperature applications.%采用固相烧结工艺制备SrBi2-xDyxNb2O9(x=0,0.03,0.05,0.07)陶瓷样品,研究了Dy3+掺杂量对其微观结构、电学性能及其高温稳定性的影响.结果表明,Dy3+并未改变陶瓷的晶体结构,并且对样品的微观形貌影响不明显,但随着Dy3+掺杂量的增加剩余极化强度(2Pr)先增大后减小,同时矫顽场(Ec)降低,居里温度(Tc)由444℃ 降低到427℃,这是由于Dy3+的掺杂影响晶格畸变的结果.当x=0.03时,陶瓷具有较好的综合性能:2Pr=16μC/cm2,Ec=56 kV/cm,Tc=436℃,说明该材料具有较好的铁电及温度稳定性.
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