Process for producing a porcelain, porcelain and ceramic...

C - Chemistry – Metallurgy – 04 – B

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C04B 33/26 (2006.01) H01B 3/12 (2006.01) H01B 19/00 (2006.01)

Patent

CA 2383723

The invention relates to a method for producing a porcelain, to an especially high-strength porcelain and to a ceramic isolator. According to the invention, calcinated bauxite (B) is used instead of alumina. Simultaneously, argil (T) and kaolin (K) are added, each having a content of more than 5 % by weight of intercalated foreign metal oxides. A porcelain is obtained according to the inventive method that can be produced at much lower costs than aluminous porcelain while having the same mechanical strength. The porcelain is especially suitable for use in components of the electrical insulation technology that are subject to high mechanical stresses.

La présente invention concerne un procédé de fabrication d'une porcelaine, en particulier d'une porcelaine hautement résistante, ainsi qu'isolateur en céramique. Pour fabriquer ladite porcelaine, on remplace l'alumine par de la bauxite calcinée (B). L'introduction simultanée d'argile (T) et de kaolin (K) avec 5 % en poids de chacune de ces deux substances d'oxydes métalliques étrangers intercalés permet d'obtenir une porcelaine qui peut être fabriquée à un coût bien moindre que la porcelaine à base d'alumine, pour une résistance mécanique identique. Ladite porcelaine est particulièrement adaptée pour des applications telles que les composants à forte sollicitation mécanique dans le cadre de la technique d'isolation électrique.

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