Method for producing powder from polycrystalline inorganic material
US5524836A · kind A · utility
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22Claims
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Key dates
| Filing date | Feb 12, 1993 |
| Grant date | Jun 11, 1996 |
| Priority date | — |
| Expiry date | Feb 12, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01G49/12
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for producing powder from polycrystalline inorganic material by contacting polycrystalline inorganic material with the vapor of one or more reduced alkali metals in an environment substantially free of oxygen for a period of time sufficient to cause disintegration of the polycrystalline inorganic material into powder. The polycrystalline inorganic material may consist of one or more oxides, sulfides, or silicates, or combinations thereof. The polycrystalline inorganic material may also comprise a rock or mineral, such as basalt or pyrite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.