Glass-ceramics process for their preparation and use
AssigneeColorobbia Italia S.P.A.
InventorsMarco Bitossi, Giovanni Baldi, Davide Settembre Blundo, Enrico Generali
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Abstract
The present invention refers to glass-ceramics consisting of the mixtures (I): ZrO2—SiO2—MeIIO, or (II) SiO2—MeIIIO2—MeIIO, wherein: MeII is chosen in the group consisting of: Ca, Ba, Mg, Zn or mixture thereof; MeIII is chosen in the group consisting of Al, B or mixtures thereof; each of the above said constituents being present in determined quantities; the invention refers also to a process for preparing the glass-ceramics above defined; porcelain stonewares and glazes containing them and their use for preparing ceramic items.
Claims11
Glass-ceramics consisting of the mixture (I) or (II):
- (I) ZrO2—SiO2—MeIIO
- (II) SiO2—Me2IIIO2—MeIIO
- wherein in mixture (I):
- MeII is chosen in the group consisting of:
- Ca, Ba, Mg, Zn or mixtures thereof and the percentage (in weight) for each component is:
- ZrO2=5-25%
- SiO2=45-75%
- MeIIO=15-45%
- and in mixture (II):
- MeII is as above defined;
- MeIII is chosen in the group consisting of:
- Al, B or mixtures thereof and the percentage (in weight) for each of the above said components is:
- SiO2=30-65%
- Me2IIIO3=5-25%
- MeIIO=5-40%
Porcelain stoneware consisting of a glass ceramic (a-d) having the following composition (in weight):
- 28 SrO Al2O3 SiO2 ZrO K2O MgO a 30-40 25-30 30-45 b 40-50 10-25 30-40 c 15-25 60-70 10-20 d 20-25 10-25 45-55 5-15
- and a traditional mixture of compounds used in the production of porcelain stoneware.
Porcelain stoneware consisting of the following compositions (in weight):
- 29 Glass-ceramics according to % Glass- % Traditional Traditional Materials invention ceramics materials SiO2 76.0 GC2 5 95 Al2O3 17.8 MgO 0.8 CaO 1.0 Na2O 2.3 K2O 2.1 SiO2 54.6 GC2 50 50 Al2O3 41.8 MgO 0.2 CaO 0.7 Na2O 0.4 K2O 2.3 SiO2 54.5 GC2 65 35 Al2O3 42.5 MgO 0.2 CaO 0.5 Na2O 0.3 K2O 2.0 SiO2 73.5 GC3 5 95 Al2O3 18.1 MgO 0.8 CaO 1.0 Na2O 3.5 K2O 3.1 SiO2 84.0 GC3 50 50 Al2O3 10.3 MgO 0.3 CaO 0.7 Na2O 2.4 K2O 2.3 SiO2 56.3 GC3 65 35 Al2O3 39.5 MgO 0.3 CaO 0.6 Na2O 1.3 K2O 2.0 SiO2 74.8 GC4 5 95 Al2O3 20.1 MgO 0.7 CaO 1.1 Na2O 1.2 K2O 2.1 SiO2 61.3 GC4 50 50 Al2O3 35.3 MgO 0.3 CaO 0.1 Na2O 1.2 K2O 1.8 SiO2 60.0 GC4 65 35 Al2O3 37.0 MgO 0.2 CaO 0.8 Na2O 1.0 K2O 1.0 SiO2 72.2 GC5 5 95 Al2O3 18.5 MgO 0.9 CaO 1.3 Na2O 4.0 K2O 3.1 SiO2 81.5 GC5 50 50 Al2O3 12.0 MgO 0.2 CaO 1.0 Na2O 2.2 K2O 3.1 SiO2 58.5 GC5 65 35 Al2O3 37.3 MgO 0.3 CaO 0.6 Na2O 1.0 K2O 2.3 SiO2 76.0 GC9 5 95 Al2O3 17.8 MgO 0.8 CaO 1.0 Na2O 2.3 K2O 2.1 SiO2 62.8 GC9 50 50 Al2O3 25.8 MgO 0.2 CaO 0.9 Na2O 7.1 K2O 3.2 SiO2 63.6 GC9 65 35 Al2O3 31.6 MgO 0.3 CaO 1.1 Na2O 1.0 K2O 2.4 SiO2 75.9 GC6 5 95 Al2O3 17.7 MgO 0.8 CaO 1.0 Na2O 2.5 K2O 2.1 SiO2 72.8 GC6 50 50 Al2O3 10.1 MgO 6.7 CaO 0.2 Na2O 7.5 K2O 2.7 SiO2 67.0 GC6 65 35 Al2O3 20.0 MgO 2.2 CaO 0.4 Na2O 7.8 K2O 2.6 SiO2 74.0 GC7 5 95 Al2O3 14.2 MgO 1.5 CaO 1.5 Na2O 4.2 K2O 4.6 SiO2 72.6 GC7 50 50 Al2O3 14.8 MgO 1.3 CaO 2.0 Na2O 9.0 K2O 0.3 SiO2 65.9 GC7 65 35 Al2O3 23.6 MgO 0.2 CaO 0.9 Na2O 9.1 K2O 0.3 SiO2 74.3 GC8 5 95 Al2O3 15.8 MgO 1.5 CaO 2.2 Na2O 3.7 K2O 2.5 SiO2 68.0 GC8 50 50 Al2O3 26.8 MgO 2.2 CaO 0.4 Na2O 1.0 K2O 1.6 SiO2 67.0 GC8 65 35 Al2O3 28.0 MgO 1.8 CaO 1.2 Na2O 0.3 K2O 1.7 SiO2 74.0 GC10 5 95 Al2O3 17.6 MgO 1.8 CaO 1.4 Na2O 3.7 K2O 1.5 SiO2 69.0 GC10 50 50 Al2O3 26.8 MgO 1.2 CaO 0.4 Na2O 1.0 K2O 1.6 SiO2 67.9 GC10 65 35 Al2O3 28.5 MgO 1.0 CaO 1.1 Na2O 0.4 K2O 1.1 SiO2 78.0 GC11 5 95 Al2O3 10.8 MgO 2.2 CaO 0.4 Na2O 6.0 K2O 2.6 SiO2 70.1 GC11 50 50 Al2O3 14.9 MgO 8.7 CaO 0.1 Na2O 4.3 K2O 1.9 SiO2 69.0 GC11 65 35 Al2O3 27.0 MgO 1.0 CaO 1.1 Na2O 1.0 K2O 0.9
Dependencies are inferred from the claim text.