Patent ID: 7763223
Filing Date: 2010-07-27
Classification: C01B,C30B

Abstract:
1. A method for manufacturing porous silica crystals through a hydrothermal reaction, comprising: preparing a surface-smoothed bulk material comprising a compound containing both silicon and oxygen, a hydrothermal synthesis vessel, a small vessel and porous silica seed crystals; placing the small vessel in the hydrothermal synthesis vessel; placing the porous silica seed crystals in the small vessel; fixing the bulk material so that at least part of it is present in the small vessel; and performing the hydrothermal reaction in the hydrothermal synthesis vessel wherein the bulk material is served as a supply source for a part or a whole of the structure composition elements of the porous silica crystals, a higher concentration of silicon is formed inside the small vessel, and the porous silica crystals are formed on the surface of the bulk material.