Patent ID: 9017477
Filing Date: 2015-04-28
Classification: C01B,C30B,Y10T

Abstract:
1. A process for producing colloidal crystals, comprising: a preparation step of preparing a colloidal polycrystal dispersion in which colloidal polycrystals melt at a given temperature; an introduction step of introducing the colloidal polycrystal dispersion into a vessel; and a recrystallization step of recrystallizing the colloidal polycrystals, by setting a temperature of a partial area or a whole area of the colloidal polycrystal dispersion in the vessel to a temperature at which the colloidal crystals do not form and thereafter changing the temperature to a temperature at which the colloidal crystals form, wherein a weak acid or a weak base is added to the colloidal polycrystal dispersion, a degree of dissociation of the weak acid or the weak base changes depending on a change in temperature, and the colloidal crystals form depending on a change in pH caused by the change in temperature.