Melted magnesium aluminate grain rich in magnesium
US10494308B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Sep 14, 2016 |
| Grant date | Dec 3, 2019 |
| Priority date | — |
| Expiry date | Sep 14, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/85
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A fused grain is essentially composed of a matrix of a magnesium aluminum oxide of MgAl2O4 spinel structure and/or of the MgO—MgAl2O4 eutectic structure, and of inclusions essentially composed of magnesium oxide. The grain has the following overall chemical composition, as percentages by weight, expressed in the form of oxides: more than 5.0% and less than 19.9% of Al2O3, Al2O3 and MgO together represent more than 95.0% of the weight of the grain. The cumulative content of CaO and of ZrO2 is less than 4000 ppm, by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.