Compositions for the decoration of ceramic materials
US6881690B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2003 |
| Grant date | Apr 19, 2005 |
| Priority date | — |
| Expiry date | Aug 1, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
New decorating materials suitable for the decoration of ceramic materials comprise a lead-free glass flux and at least one pigment. The glass flux comprises two lead-free glass compositions. One of the two glass compositions comprises, in weight percent, SiO2: 45 to 60%, Al2O3: 5 to 20%, B2O3: 15 to 30%, and one or more alkali metal oxides: 5 to 10%, provided that Li2O is contained in an amount of 2% or more, with the proviso that the total amount of said oxides is 90% or more of the total weight of the composition. The other of the two glass compositions comprises, in weight percent, SiO2: 60 to 75%, Al203: 5 to 20%, at least one of MgO, CaO, ZnO: 5 to 20% in total, and one or more alkali metal oxides: 0.5 to 5%, provided that Li2O is contained in an amount of 0.5% or more, with the proviso that the total amount of said oxides is 90% or more of the total weight of the composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.