| 摘要 |
A method for producing fine particles, which comprises feeding a melt (1) of a material to be pulverized into a liquid cooling medium (4) in such a manner as to cause the boiling through spontaneous formation of vapor bubble nuclei, thereby cooling the molten material (1) rapidly to a solid while forming fine particles thereof utilizing the pressure wave induced by the boiling; and an apparatus for practicing the method which comprises a material feeding means (3), a cooling section (2) which introduces the cooling medium (4) in an an amount being small and sufficient to cool and solidify the fed molten material (1) and cools the molten material (1) rapidly to a solid while forming fine particles thereof utilizing the pressure wave induced by the boiling caused through spontaneous formation of vapor bubble nuclei, and a recovering means (5) for recovering the fine particles from in the cooling medium (4). The method allows the production with ease of particles having a size of from sub-micron order to 100 microns order, especially a few microns, which has not been achieved by conventional methods and apparatus, and the production of particles having a desired size in good yield and in a large amount.
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