Transparent bulk silica porous material with uniform pore size and distribution
US5958577A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1998 |
| Grant date | Sep 28, 1999 |
| Priority date | — |
| Expiry date | Jan 6, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/261
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The method for producing a bulk silica porous material is presented. The obtained material has a large crystal size serving to reduce light scattering, and uniform and adjustable pore size. This can be utilized for optical and electronic functional materials. The method comprises the steps of: PA1 forming a silica/surfactant composite by mixing starting materials containing an alkoxysilane, water and a surfactant and allowing to the starting materials to react; PA1 maturing said silica/surfactant composite by allowing the same to stand in a closed container to effect the development of a silica network structure and the formation of porous structure in said composite; PA1 drying said matured silica/surfactant composite for removing the solvent and for condensation of said matured silica/surfactant composite; and, PA1 sintering said condensed silica/surfactant composite to remove the surfactant to obtain a silica porous material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.