Influence of the mullite phase on the increase of resistance to aging processes of different types of electrotechnical porcelain

The paper presents the research of the influence of the mullite phase on the short-and long-term mechanical strength of the electrotechnical porcelain of different types (C 110, C 112, C 120 and C 130). The total mullite phase content, size and distribution of precipitates and dispersed single crystals in the glassy matrix were considered. During investigation mechanoacoustic and microscopic techniques as well as ultrasonic testing were used. The role of the mullite phase in the increase of resistance to aging processes of electrical porcelain of various types was described. (Influence of the mullite phase on the increase of resistance to aging processes of different types of electrotechnical porcelain).