Abstract We designed a new type of perovskite-related dielectric material Na1/3Cd1/3Y1/3Cu3Ti4O12 (NCYCTO) with colossal permittivity via a solid-state method. A decent dielectric performance of colossal permittivity ~4.0 × 104 and low dielectric loss ~0.065 was achieved in NCYCTO ceramics sintered at 1060 °C for 15 h. Electronic heterogeneity structure in NCYCTO ceramics was confirmed combined with the analysis of the dielectric properties, conductivity characteristics and complex impedance behavior, which consist of semiconductor grains and large resistance insulating grain boundary. Notably, internal barrier layer capacitor effect was adopted to explain the decent dielectric performance based on the analysis of dielectric response behavior and complex impedance. Our finding in this work not only explored the dielectric response of the new type of giant dielectric ceramics Na1/3Cd1/3Y1/3Cu3Ti4O12 but also provides useful insight to simultaneously realize the low dielectric loss and colossal permittivity in ACu3Ti4O12 dielectric ceramics.

中文翻译：

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Na1/3Cd1/3Y1/3Cu3Ti4O12陶瓷大介电常数和低介电损耗的起源

摘要 我们通过固态方法设计了一种具有巨大介电常数的新型钙钛矿相关介电材料 Na1/3Cd1/3Y1/3Cu3Ti4O12 (NCYCTO)。在 1060°C 下烧结 15 小时的 NCYCTO 陶瓷实现了良好的介电性能，介电常数为 ~4.0 × 104，介电损耗低 ~0.065。NCYCTO陶瓷中的电子异质结构与介电特性、导电特性和复阻抗行为的分析相结合，由半导体晶粒和大电阻绝缘晶界组成。值得注意的是，基于对介电响应行为和复阻抗的分析，采用内部阻挡层电容器效应来解释良好的介电性能。