【作者】 丑修建； 翟继卫； 姚熹；

【Author】 CHOU Xiujian ZHAI Jiwei YAO Xi (Functional Materials Research Laboratory,Tongji University,Shanghai 200092,China)

【机构】 同济大学功能材料研究所；

【摘要】 通过 A 位或 B 位掺杂改性得到的钛酸钡基铁电材料,在外加直流偏置电场作用下,具有介电常数非线性可调的优异介电性能, 可以广泛地应用于压控可调陶瓷电容器和微波可调器件领域。针对钛酸钡基铁电材料的介电非线性特性,讨论了 BaTiO₃基铁电材料分别在铁电相、顺电相以及相转变温度场附近的介电非线性机理和相关理论；结合笔者近年来有关介电非线性研究的实验结果和相关文献报道, 综述了不同 A 位离子(如 Sr²⁺和 Ca²⁺等)或 B 位离子(如 Zr⁴⁺和 Sn⁴⁺等)掺杂的 BaTiO₃基铁电材料体系的介电非线性研究现状,分别对不同物质形态（陶瓷块体、薄膜和厚膜）的 BaTiO₃基铁电材料的介电非线性研究及其应用进行了对比分析；并对钛酸钡基铁电材料今后的发展趋势和研究方向进行了展望。更多还原

【Abstract】 BaTiO₃-based ferroelectric materials,which are modified by the substitution of A-site or B-site ions,can potentially be applied in voltage-controlled tunable ceramic capacitors and microwave devices due to their excellent dielectric nonlinearity under DC electric fields.In this paper,the mechanism of dielectric nonlinearity and relative theory of BaTiO₃-based ferroelectric materials in ferroelectric phase,paraelectric phase and the phase transformation process are discussed.According to our experimental results and related literatures,the dielectric nonlinearity and applications of BaTiO₃-based ferroelectric materials including ceramic blocks and thin and thick films are reviewed.Some technical problems in the research of dielectric non-linear ferroelectric materials are also discussed.更多还原