Highly efficient method for producing ceramic microparticles

摘要

Provided is a more suitable method for producing ceramic microparticles. The present invention uses at least two types of fluids to be processed; at least one of the fluids to be processed is a fluid containing a ceramic starting material liquid that mixes and/or dissolves a ceramic starting material in a basic solvent; of the fluids aside from the ceramic starting material liquid, at least one of the fluids to be processed is a fluid containing a solvent for precipitating ceramic microparticles; and ceramic microparticles are precipitated by mixing the fluid containing the ceramic starting material liquid and the fluid containing the solvent for precipitating ceramic microparticles within a thin film fluid formed between at least two surfaces (1,2) for processing that are provided facing each other, are able to approach and separate each other, and of which one is able to rotate with respect to the other. Ceramic microparticles having as increased crystallinity are obtained by mixing the fluid containing the precipitated ceramic microparticles precipitate and a fluid containing an acidic substance.

主权项

1. A method for producing a ceramic microparticle, comprising the steps of:
(I) preparing a ceramic raw material solution that is obtained by mixing and/or dissolving at least one ceramic raw material in a basic solvent; (II) preparing a solvent for separating a ceramic microparticle; (III) preparing at least one acidic substance; (IV) separating a ceramic microparticle, comprising the sub-steps of:
preparing at least two fluids to be processed, including a first fluid and a second fluid, at least one of the first and second fluids containing the ceramic raw material solution, at least the other of the first and second fluids containing the solvent for separating the ceramic micropaticle;introducing the at least two fluids into a processing device, the processing device comprising at least two processing surfaces facing each other, the at least two processing surfaces being operable to approach to and separate from each other, at least one of the at least two processing surfaces rotating relative to the other;mixing the at least two fluids in a space formed between the at least two processing surfaces, thereby forming a thin film fluid between the at least two processing surfaces; andseparating the ceramic microparticle in the thin film fluid to obtain a separated ceramic microparticle; and (V) mixing a fluid which contains the separated ceramic microparticle obtained in the step (IV) with a fluid which contains the at least one acidic substance.