Process for making porous ceramic composites with a bimodal pore size distribution
US6245698A · kind A · utility
Inventors
Key dates
| Filing date | Aug 5, 1993 |
| Grant date | Jun 12, 2001 |
| Priority date | — |
| Expiry date | Aug 5, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2214/06
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for making a porous ceramic composite with a bimodal pore size distribution includes the steps of mixing an organosilicon precursor, an alcohol, water, a catalyst, granules, particles, whiskers or powders of a fumed silica and granules, particles, whiskers or powders of a ceramic material and a combustible material having a diameter in a range of 500 angstroms to 500 microns to form a mixture, pouring the mixture into a mold, allowing the mixture to gel form a ceramic composite and drying the ceramic composite. The process also includes the step of heating the ceramic composite in either air or oxygen to burn away the combustible material. The organosilicon precursor is selected from a group consisting of tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane and tetrabutoxysilane. The alcohol is selected from the group consisting of methanol, ethanol, propanol and butanol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.