Abstract A novel perovskite La0.86Cu3Ti3.42Al0.58O12 (LCTAO) ceramic was fabricated by a conventional solid-state method, and the dielectric property was systematically investigated. Pure phase with a body-centered cubic structure was confirmed by X-ray diffraction. High dielectric permittivity was performed in wide temperature and frequency ranges. Impedance spectroscopy analysis demonstrated microstructure was electrically heterogeneous, which resulted in a giant dielectric response based on the internal barrier layer capacitor (IBLC) model. The results of X-ray photoelectron spectroscopy indicated the active electron hopping process of the mixed-valence states charge carriers, i.e. Cu+/Cu2+, Ti3+/Ti4+, may be responsible for the semiconduction of grains.

中文翻译：

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钙钛矿La0.86Cu3Ti3.42Al0.58O12陶瓷的介电性能

摘要 采用常规固态方法制备了一种新型钙钛矿La0.86Cu3Ti3.42Al0.58O12 (LCTAO)陶瓷，并对其介电性能进行了系统研究。X 射线衍射证实了具有体心立方结构的纯相。在较宽的温度和频率范围内实现了高介电常数。阻抗谱分析表明微结构是电异质的，这导致基于内部势垒层电容器 (IBLC) 模型的巨大介电响应。X射线光电子能谱结果表明，Cu+/Cu2+、Ti3+/Ti4+等混合价态电荷载流子的活性电子跳跃过程可能是导致晶粒半导体化的原因。