科学技术与应用

空气淬火和氧气烧结下 0.68Bi_1.02FeO₃-0.32BaZr_0.005Ti_0.995O₃ 无铅压电陶瓷的结构与电性能研究

杨 明宇

景德镇陶瓷大学材料科学与工程学院

聂 鑫

景德镇陶瓷大学材料科学与工程学院

DOI: https://doi.org/10.59429/kxjsyy.v3i3.14818

Keywords: 无铅压电陶瓷；工艺优化；空气淬火；氧气烧结

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Abstract

本文采用传统固相法制备 0.68Bi_1.02FeO₃-0.32BaZr_0.005Ti_0.995O₃ 无铅压电陶瓷，并通过空气淬火和氧气烧结方式 对陶瓷样品进行工艺优化，系统研究两种方式对陶瓷样品的结构与电性能的影响。通过 X 射线衍射表征了陶瓷的晶 体结构；扫描电子显微镜显示了陶瓷的显微形貌；以及阻抗分析仪、铁电仪和准静态 d₃₃ 测试仪等设备对陶瓷的介 电、铁电和压电等进行测试。实验结果表明：空气淬火能够有效改善陶瓷的电性能，将压电常数 d₃₃ 从 150 pC/N 提 升到 169 pC/N；居里温度 T_c 从 442℃提升到 453℃。而氧气烧结使陶瓷晶粒尺寸减小，恶化了陶瓷的电性能，压电 常数 d₃₃ 从 150 pC/N 降低到 110 pC/N；居里温度 T_c 从 442℃降低到 422℃。本研究对高性能的无铅压电陶瓷研发提 供了一个新的思路和方案。

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