CERAMIC MATERIAL FOR ELECTRICAL SWITCHING DEVICES Russian patent published in 2024 - IPC C04B35/195 

FIELD: chemistry.

SUBSTANCE: invention relates to a ceramic material used in electrical switching devices, in which, when disconnected, it is required to extinguish high-temperature electric arcs and can be widely used in urban electric transport and electric networks, locomotives and railway networks. Ceramic material for electrical switching devices contains components in the following ratio, wt.%: Al₂O₃ in form of corundum 14–23.8, cordierite (2MgO-2Al₂O₃-5SiO₂) 50–70, mullite (3Al₂O₃-2SiO₂) 16–26.2. When making ceramic material, a plasticiser is added to the mixture, molding is carried out under pressure, the plasticiser is removed from the charge and annealed at temperature of 1410 °C.

EFFECT: increased efficiency of arc suppression and reliability due to improved arc resistance and heat resistance of ceramic material.

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