Patent ID: 9044758
Filing Date: 2015-06-02
Classification: B02C

Abstract:
1. A method for producing fine powder, comprising the steps of: suspending two or more kinds of original materials in liquefied inert gas that is used as disperse medium to form a slurry, and putting grinding medium in said slurry, and then stirring said slurry to pulverize said original materials into submicron sized and/or nano-sized particles, wherein said grinding medium consists entirely of dry ice beads so that said original materials are pulverized by said dry ice beads in said liquefied inert gas; sublimating said dry ice beads from said slurry; and vaporizing said liquefied inert gas from said slurry to recover a mixture of said two or more kinds of original materials having improved solubility and/or degree of homogeneous mixing.