中文摘要：

采用传统固相法制备了Pb0.925Ba0.075Nb2O6-0.5wt.%TiO2(PBN-T)压电陶瓷,并详细研究了退火对PBN-T陶瓷的结构、介电及压电性能的影响规律。实验中选取退火温度为500~800℃,退火时间为12~168h,退火气氛为空气中无额外Pb2+源、空气中含额外Pb2+源及氮气中含额外Pb2+源。结果表明:陶瓷的电学性能与退火参数密切相关,在600℃、氮气中含额外Pb2+源气氛下退火73h的陶瓷试样具有较佳性能,其居里温度为523℃,室温下压电常数为85pC/N,极化试样经500℃热处理后仍具有较高的压电常数82pC/N。

英文摘要：

Using conventional solid state reaction method,the Pb0.925 Ba0.075 Nb2 O6-0.5wt.%TiO2 (PBN-T)piezoelectric ceramics were fabricated.The effects of annealing on structure,dielectric and piezoelectric properties of the PBN-T ceramics were investigated.The annealing temperatures and annealing time were chosen as 500 ~ 800 ℃ and 12~168 h,respectively.The annealing at-mospheres were selected as air without excess Pb2+ source,air with excess Pb2+ source and nitro-gen atmosphere with excess Pb2+ source.The results show that the electrical properties of the ce-ramics are tightly related to the annealing parameters.The ceramic annealed in nitrogen atmos-phere with excess Pb2+ source at 600 ℃ for 73 h shows the better property,where the Curie tem-perature is 523 ℃,the piezoelectric constant is 85 pC/N at room temperature,and 82 pC/N after thermal treating at 500 ℃.