METHOD FOR PRODUCING METAL MICROPARTICLES

摘要

Provided is a method for producing metal microparticles in which the ratio of crystallite diameter to the particle diameter of the metal microparticles is controlled. At least two types of fluid to be processed are used, including a metal fluid in which a metal or a metal compound is dissolved in a solvent, and a reducing agent fluid which includes a reducing agent. Sulfate ions are included in one or both of the metal fluid and the reducing agent fluid. The fluid to be processed is mixed in a thin film fluid formed between at least two processing surfaces, at least one of which rotates relative to the other, and which are disposed facing each other and capable of approaching and separating from each other, and metal microparticles are precipitated. The present invention is characterized in that at this time, the ratio (d/D) of the crystallite diameter (d) of the metal microparticles to the particle diameter (D) of the metal microparticles is controlled by controlling the molar ratio of metal and sulfate ions in the mixed fluid to be processed.

主权项

1. A method for producing metal microparticle, wherein
at least two fluids to be processed are used, of these fluids to be processed, at least one fluid to be processed is a metal fluid in which a metal or a metal compound is dissolved in a solvent, at least one fluid to be processed other than the said fluid to be produced is a reducing agent fluid which contains a reducing agent, of these fluids to be processed, at least one fluid to be processed contains a sulfate ion, the fluids to be processed are mixed in a thin film fluid formed between at least two processing surfaces which are disposed in a position they are faced with each other so as to be able to approach to and separate from each other, at least one of which rotates relative to the other, whereby separating metal microparticle derived from the metal or the metal compound in the metal fluid, and by controlling a molar ratio of the sulfate ion to the metal in the mixed fluid to be processed, a ratio (d/D) of a crystallite's diameter (d) of the metal microparticle to a particle diameter (D) of the metal microparticle is controlled.