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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 poly crystalline inorganic material may also comprise a rock or mineral, such as basalt or pyrite.
Board of Control of Michigan Technological University, Houghton, Mich.
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Engineering | Materials Science and Engineering
Kawatra, Surendra K. and Eisele, Timothy C., "Method for producing powder from polycrystalline inorganic material" (1996). Michigan Tech Patents. 84.