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US 7,892,997 B2Granted
Glaze compositions
AssigneeU.S. Borax Inc.
InventorsSimon Gregson Cook, Miguel Joaquin Galindo Cercos
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AssigneeU.S. Borax Inc.
InventorsSimon Gregson Cook, Miguel Joaquin Galindo Cercos
Estimating the term…
This invention relates to boron-containing compositions for use in glaze compositions. There is provided a boron-containing composition for use in glaze production, which composition is obtainable by a process which comprises heating to a temperature sufficiently high that calcination occurs but insufficient for the formation of a homogeneous melt a mixture comprising components capable, under the conditions of heating, of forming the oxides B2O3, SiO2, Al2O3, Na2O and optionally CaO in proportions such that the relative percentages by weight of the said oxides, based on the total weight of the said oxides, are as follows: 10 to 18% B2O3, 40 to 65% SiO2, 17 to 32% Al2O3, 4 to 9% Na2O, and 0 to 10% CaO. The boron-containing compositions according to the present invention may be used in glaze compositions, suitably frit-free or boron-free frit-containing glaze compositions.
A frit-free, comminuted boron-containing composition for use in glaze production, which composition is obtained by a process which comprises heating to a temperature sufficiently high that calcination occurs but insufficient for the formation of a homogeneous melt a mixture comprising components capable, under the conditions of heating, of forming the oxides B2O3, SiO2, Al2O3, Na2O and optionally CaO in proportions such that the relative percentages by weight of the said oxides, based on the total weight of the said oxides, are as follows:
A process for preparing a boron-containing composition for use in a glaze composition, which process comprises heating to a temperature sufficiently high that calcination occurs but insufficient for the formation of a homogeneous melt a composition in particulate form comprising a mixture of components capable, under the conditions of heating, of yielding the oxides B2O3, SiO2, Al2O3, Na2O, and optionally CaO in proportions such that the relative percentages by weight of the said oxides, based on the total weight of the said oxides, are as follows:
Dependencies are inferred from the claim text.