Method for preparing bulk C—AlN composite aerogel with high strength and high temperature resistance
US9869422B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2013 |
| Grant date | Jan 16, 2018 |
| Priority date | — |
| Expiry date | Aug 13, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/48
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is a method for preparing a bulk C—AlN composite aerogel with high strength and high temperature resistance, which includes: evenly stirring aluminum chloride crystals, water, ethanol and epoxy propane, to obtain a clear aluminum oxide sol solution, then adding formaldehyde and resorcinol to the solution and performing even stirring, to obtain an RF/Al2O3 composite aerogel sol solution, leaving the gel to stand, treating the sample by using a supercritical CO2 drying method, and finally heat-treating the sample at a high temperature under the condition of nitrogen, to obtain the bulk C—AlN composite aerogel with high strength and high temperature resistance. The composite aerogel prepared by using this method has advantages of high integrity, high specific surface area, intact structure, low heat conductivity, low density, and high strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.