| abstract |
A dissolving step of dissolving at least one kind of fine particle raw material in a solvent using a stirrer having a rotating stirring blade to obtain a fine particle raw material solution, at least one type of precipitation solvent for precipitating the fine particle raw material from the fine particle raw material solution, Is introduced between at least two processing surfaces facing each other and capable of approaching and separating, at least one of which rotates relative to the other, and is mixed in a thin film fluid formed between at least two processing surfaces to form fine particles And a precipitation step of precipitating the fine particles. The stirring step may be performed by changing at least one of the above conditions by stirring energy defined by a stirring time condition by a stirrer, a peripheral speed condition of a stirring wing, and a temperature condition of a fine particle raw material solution in the dissolving step, To control the crystallinity and crystal form of the fine particles. |