Dispersing or milling apparatus, and dispersing or milling method using same
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United States of America Patent
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Mar 1, 2011
Grant Date -
Aug 21, 2008
app pub date -
Feb 14, 2008
filing date -
Feb 20, 2007
priority date (Note) -
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Abstract
A material to be treated containing solid particles in a liquid is stirred together with milling media, and irradiated with ultrasonic waves during stirring to finely mill the solid particles to nanometer size and disperse the solid particles in the liquid. The ultrasonic waves create cavitation in the liquid and upon decay of the cavitation, shock waves are produced that cause the solid particles to vigorously collide with one another and with the milling media and these collisions, together with the shearing forces created by collision of the milling media, can produce on a commercial scale nano particles having an average particle size of at most 100 nm.
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