Ceramic composition for the production of the upper layer of double layered stoneware tiles

European Patent Office Patent

APP PUB NO EP-0482468-A1
SERIAL NO

91117519

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Abstract

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The invention relates to ceramic compositions for producing the cover layer of two-layer stoneware tiles, which have the following composition: clay (white burning), 13-40 wt .-%; Wollastonite, 0-25% by weight; Potassium feldspar, 8-32% by weight; Sodium feldspar, 5-15% by weight; Lithium feldspar, 0-12% by weight; Nepheline syenite, 3-15% by weight; Frit, 0-25% by weight; ZnO, 0-5% by weight; calcined kaolin / clay, 6-24% by weight; calcined alumina, 3-16% by weight; ZrSiO4, 0-10% by weight as well as a dry and burning shrinkage of 4 to 12% and a thermal expansion coefficient of (50-90) x10 <-> <7> ° K <-> ¹ (at 20 to 400 ° C ) exhibit.

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Patent Owner(s)

Patent OwnerAddress
BAYER ITALIA SPAIT

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Inventor(s)

Inventor Name Address
SALGE HENNING DR D-5000 KOELN 80
SCHLEGEL CHRISTIAN VIA VIRGIOLIO 1 I-21040 VENEGONO SUPERIORE I-21040 VENEGONO SUPERIORE

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