Method of manufacturing slabs of ceramic material
OwnerLuca Toncelliinventor
Life of this patent
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Abstract
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.
Claims20
A method for manufacturing slabs of ceramic material, the method comprising:
- preparing an initial mix, the initial mix comprising ceramic sands, a binder and a filler, the ceramic sands having a grain size of less than approximately 2 mm, the binder excluding fibers of high-melting inorganic material and comprising an aqueous dispersion of colloidal silica called silicasol mixed with a component for enhancing mechanical properties of the mix during drying and firing step, and the filler comprising mineral powders mixed with clays and/or kaolinites, the mineral powders being chosen from feldspars, nephelines and sienites, which powders after firing form a continuous ceramic matrix, the component characterized as decomposing entirely at a temperature lower than firing temperature of the mix, the component being an organic binder;
- depositing the initial mix on a temporary support;
- compacting the deposited mix by means of vacuum vibrocompression;
- and
- drying and firing the compacted mix.
A method for manufacturing slabs of ceramic material, the method comprising:
- preparing an initial mix, the initial mix comprising ceramic sands, a binder and a filler, the ceramic sands having a grain size of less than approximately 2 mm, the binder excluding fibers of high-melting inorganic material and comprising an aqueous dispersion of colloidal silica called silicasol mixed with a component for enhancing mechanical properties of the mix during drying and firing step, and the filler comprising mineral powders mixed with clays and/or kaolinites, the mineral powders being chosen from feldspars, nephelines and sienites, which powders after firing form a continuous ceramic matrix, the component characterized as decomposing entirely at a temperature lower than firing temperature of the mix, the component being an organic binder;
- depositing the initial mix on a temporary support;
- compacting the deposited mix by means of vacuum vibrocompression;
- drying and firing the compacted mix;
- placing a sheet of porous material on an upper surface of the deposited initial mix prior to the drying and firing, the sheet of porous material being covered, on a side that contacts the deposited mix, with a protective refractory layer.
Dependencies are inferred from the claim text.