Novel sodium niobate-based composite dielectric energy storage ceramic material

The invention belongs to the technical field of functional ceramic materials, and particularly relates to a novel sodium niobate-based composite dielectric energy storage ceramic material and a preparation method thereof. Sodium niobate (NaNbO3) is a typical lead-free dielectric material, shows obvious relaxor ferroelectricity at room temperature, and is not suitable for being directly used as an energy storage medium due to large remanent polarization and low anti-breakdown field intensity. At present, mainstream performance optimization means comprise the modes of process technology improvement, ion doping modification, multi-component compounding and the like. Wherein a multi-component compounding mode has component diversity, so that the adjustability is high, advantage complementation among the components can be formed through effective blending, and the comprehensive energy storage performance is improved. 本发明属于功能陶瓷材料技术领域，具体涉及一种新型铌酸钠基复合介电储能陶瓷材料及其制备方法。铌酸钠(NaNbO3)是一种典型的无铅介电材料，在室温下表现出明显的弛豫铁电性，剩余极化强度偏大且抗击穿场