Abstract

Effects of BiFeO₃ (BFO) on the properties of strontium iron niobate, Sr(Fe_0.5Nb_0.5)O₃ ceramics were investigated and synthesized using a conventional solid-state reaction method. X-ray diffraction analysis revealed that all ceramics exhibited a single perovskite structure with orthorhombic symmetry. The x = 0.05 ceramic showed a very high dielectric constant (ε_r > 40,680 at 1 kHz). By using a complex impedance analysis technique, bulk, grain boundary, and electrode responses were found to affect the dielectric behavior which could be related to the Maxwell–Wagner polarization mechanism. Furthermore, ferroelectric behavior was also found to improve for a higher amount of BFO content.

摘要

研究了BiFeO ₃（BFO）对铌酸锶铁，Sr（Fe _0.5 Nb _0.5）O ₃陶瓷性能的影响，并采用常规固相反应法合成。X射线衍射分析表明，所有陶瓷均表现出具有正交晶对称性的单个钙钛矿结构。的X  = 0.05的陶瓷显示出非常高的介电常数（ε _ř> 40680在1 kHz时）。通过使用复杂的阻抗分析技术，发现体积，晶界和电极响应会影响介电性能，这可能与麦克斯韦-瓦格纳极化机理有关。此外，还发现铁电行为对于较高数量的BFO含量也有所改善。