Fe2O3原料的预处理对0.7BiFeO3-0.3BaTiO3陶瓷绝缘性与电性能的影响

李玮; 周昌荣; 黎清宁; 李蕊; 侯凌浩; 孟天笑

硅酸盐通报, 2022, 41 (6): 2126, 网络出版: 2022-07-24

Fe₂O₃原料的预处理对0.7BiFeO₃-0.3BaTiO₃陶瓷绝缘性与电性能的影响

Effect of Raw Material Pretreatment of Fe₂O₃ on Insulating and Electrical Properties of 0.7BiFeO₃-0.3BaTiO₃ Ceramics

论文大纲

李玮 ^1,2周昌荣 ^1,2黎清宁 ^1,2李蕊 ^1,2侯凌浩 ^1,2孟天笑 ^1,2

作者单位

¹ 桂林电子科技大学材料科学与工程学院, 桂林 541004

² 桂林电子科技大学, 广西信息材料重点实验室, 桂林 541004

摘要

BiFeO3基无铅压电陶瓷常因漏电流较大而压电性能欠佳, 然而, 改善其绝缘性和电性能的方法都较为复杂, 限制了其产业化生产与应用。本工作在不针对0.7BiFeO3-0.3BaTiO3陶瓷进行组分掺杂以及气氛烧结的条件下, 仅通过简单的原料预处理(改变Fe2O3原料的干燥时间)即实现了其高绝缘性与高压电性能。研究结果表明,0.7BiFeO3-0.3BaTiO3陶瓷的晶粒尺寸和绝缘性随Fe2O3原料干燥时间的增加而增大, 同时其电性能及温度稳定性也随之增强。当原料干燥时间为192 h时, 样品晶粒尺寸最大, 绝缘性最好, 同时其压电性能(d33=203 pC/N,kp=0.33)和居里温度(Tc=460 ℃)也达到最佳。这为今后BiFeO3基陶瓷压电性能的研究提供了一个新思路。

Abstract

BiFeO3-based lead-free piezoelectric ceramics often had poor piezoelectric properties due to large leakage currents. However, the methods of improving its insulating and electrical properties were more complicated, limiting its industrial production and application. In this work, the high insulating and high piezoelectric properties were achieved by simple raw material pretreatment (changing the drying time of Fe2O3 raw material) without component doping and atmosphere sintering of 0.7BiFeO3-0.3BaTiO3 ceramics. The results show that with the increase of the drying time of Fe2O3 raw materials, the grain sizes and insulating of 0.7BiFeO3-0.3BaTiO3 ceramics are significantly improved, and their electrical properties and temperature stability are also significantly enhanced. When the drying time of the raw material is increased to 192 h, the sample grain size is the largest, the insulating is the best, and the piezoelectric properties (d33=203 pC/N, kp=0.33) and Curie temperature (Tc=460 ℃) are also optimal. This provide a new idea for the future study of the piezoelectric properties of BiFeO3-based ceramics.

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李玮, 周昌荣, 黎清宁, 李蕊, 侯凌浩, 孟天笑. Fe₂O₃原料的预处理对0.7BiFeO₃-0.3BaTiO₃陶瓷绝缘性与电性能的影响[J]. 硅酸盐通报, 2022, 41(6): 2126. LI Wei, ZHOU Changrong, LI Qingning, LI Rui, HOU Linghao, MENG Tianxiao. Effect of Raw Material Pretreatment of Fe₂O₃ on Insulating and Electrical Properties of 0.7BiFeO₃-0.3BaTiO₃ Ceramics[J]. Bulletin of the Chinese Ceramic Society, 2022, 41(6): 2126.

Fe₂O₃原料的预处理对0.7BiFeO₃-0.3BaTiO₃陶瓷绝缘性与电性能的影响

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