Crystallization of powders having uniform particle sizes by Ostwald ripening at large levels of supersaturation
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United States of America Patent
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Apr 30, 2002
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N/A
app pub date -
Oct 24, 2000
filing date -
Oct 24, 2000
priority date (Note) -
Expired
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Abstract
A method is provided for the manufacture of mineral power crystals having a uniform mean size. The method includes forming a solution which is highly supersaturated with respect to the crystals. The crystals of the solution are Ostwald ripened at a level of supersaturation that produces an Ostwald steady state crystal size distribution shape wherein the crystals are of a uniform size. After Ostwald ripening ceases, the crystals further grow by supply controlled growth which uniformly increases the size thereof. This enables the supply controlled growth to be terminated at a selected, controlled point so as to produce a desired mean crystal size.
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