Novel glass-ceramic materials based on Na and Ca-rich feldspar crystallizations with a hierarchical micro-nanostructure shown the largest dielectric strength, >57 kV/mm, reported at room temperature in ceramic insulators, due to a large amount of interfaces that favor scattering processes of charge carriers. Dielectric breakdown tests with temperature indicated they withstood up to 200 °C, with dielectric strengths of 30 kV/mm and 44 kV/mm for anorthite and albite-based glass-ceramics, respectively. These values are even larger than the ones obtained at room temperature for most of the current ceramic insulators. Microstructural characterization and micro-Raman spectroscopy carried out after breakdown allow determining the dielectric breakdown mechanisms. Glass phases in the surroundings of the crater because of local melting and fast cooling are identified. These results make feldspar based glass-ceramics suitable for electrical insulator applications at room and high temperature. Moreover, dielectric breakdown mechanism may allow tailoring new high insulating application in the future.

新型的基于Na和Ca的长石结晶且具有分层微纳米结构的新型玻璃陶瓷材料，在室温下在陶瓷绝缘子中显示出最大的介电强度> 57 kV / mm，这是由于存在大量有利于散射的界面电荷载体的过程。介电击穿测试表明，它们经受了200°C的高温，钙长石和钠长石基玻璃陶瓷的介电强度分别为30 kV / mm和44 kV / mm。这些值甚至比大多数当前陶瓷绝缘子在室温下获得的值还要大。击穿后进行的微结构表征和显微拉曼光谱分析可以确定介电击穿机理。鉴定出由于局部熔化和快速冷却而导致的火山口周围的玻璃相。这些结果使基于长石的玻璃陶瓷适用于室温和高温下的电绝缘体应用。而且，介电击穿机制可以允许将来定制新的高绝缘应用。