Enhancement of breakdown electric field in (Ca, Sr)Cu3Ti4O12 ceramics prepared via polymer pyrolysis

The article delves into the enhancement of the breakdown electric field in (Ca, Sr)Cu3Ti4O12 ceramics prepared via polymer pyrolysis. It highlights the significant improvement in the breakdown electric field strength (Eb) achieved through Sr substitution and the polymer pyrolysis method. The study systematically investigates the phase structure, microscopic morphology, dielectric properties, and breakdown behaviors of the ceramics. Notably, the article identifies the formation of an insulating SrO phase and the reduction in grain size as key factors contributing to the enhanced Eb. The results demonstrate that the combination of Sr substitution and polymer pyrolysis is an effective strategy for developing CCTO-based ceramics with high Eb, offering potential applications in storage devices, electronics, sensors, and multifunctional devices. The article concludes by discussing the underlying mechanisms and the potential of this approach for future research and development in the field of dielectric materials.