Method for manufacturing slabs of ceramic material

Details Method for manufacturing slabs of ceramic material Method for manufacturing slabs of ceramic material

C - Chemistry, Metallurgy

04

B

C04B 35/63 (2006.01) C04B 28/26 (2006.01) C04B 35/622 (2006.01)

Patent

CA 2682485

In the method for manufacturing slabs of ceramic material which envisages preparation of an initial mix comprising ceramic sands with a grain size of less than 2 mm, preferably less than 1.2 mm, a binder and the so-called filler namely mineral powders chosen from feldspars, nephelines, sienites, mixed with clays and/or kaolinites, which powders after firing form a continuous ceramic matrix, deposition of the initial mix on a temporary support for the compaction step by means of vacuum vibrocompression, drying and firing, a binder consisting of an aqueous dispersion of colloidal silica called silicasol is used.

L'invention concerne un procédé de fabrication de plaques de matière céramique qui comprend les opérations consistant à préparer un mélange initial comprenant des sables céramiques avec une dimension de grain de moins de 2 mm, de préférence de moins de 1,2 mm, un liant et ce que l'on appelle la charge, à savoir des poudres minérales choisies parmi les feldspaths, les néphélines, les syénites, mélangées avec des argiles et/ou des kaolinites, lesquelles poudres forment après cuisson une matrice céramique continue ; à déposer le mélange initial sur un support temporaire pour l'étape de compactage au moyen d'une vibro-compression sous vide ; à sécher et à cuire. Dans ce procédé, on utilise un liant consistant en une dispersion aqueuse de silice colloïdale appelée silicasol.

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