Moriroku Chemicals Company, Ltd.

Mitsubishi Denki Kabushiki Kaisha

Masaaki Nishio

Yasuo Nakanishi

Toshiyuki Niwa

Shohei Sugimoto

Sakiko Kawamura

Kazumi Danjo

Disclosed is a method for producing a fine powder. Two or more kinds of original materials are suspended and liquefied inert gas to form two or more kinds of slurries wherein each slurry contains at least one or more different kinds of original materials. Granular dry ice grinding medium is put into the slurries. The slurries are individually stirred and the original materials are pulverized into submicron-sized or nano-sized particles in the liquefied inert gas. The slurries are thereafter mixed. The liquefied inert gas is vaporized and the granular dry ice is sublimated. A mixture of the particles of the two or more kinds of original materials is recovered.

Method for producing fine powder and the fine powder produced by the same

Disclosed is a manufacturing method for a fine powder exhibiting improved solubility, little impurity contamination, and a high recovery rate. Material to be ground and a grinding medium are suspended and stirred in a liquefied inert gas dispersion medium such as dried ice, and the material to be ground is made into a sub-micron or nano-sized fine powder. A uniform fine powder can be obtained when the material to be ground is a mixture having two or more components. Impurity contamination can be reduced by using granular dry ice as the grinding medium.

There is provided a controller() structured in such a manner that a signal of ON/OFF of electric power of the temperature control unit () is received by the signal receiving section (), according to ON/OFF of the received signal of the signal receiving section (), the correction calculating section () calculates an amount of correction, this amount of correction is sent to the amplifier output command section (), and the amplifier output command section () sends an axial feed operation command of the amount of correction to the drive unit(). Correction of the thermal displacement of the machine body generated by a change in the temperature of the machining solution can be easily, effectively conducted without using a specific device, and the machining accuracy can be enhanced.

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Tokyo, Japan

Masaaki Nishio