Porous cordierite ceramics
US4871693A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1987 |
| Grant date | Oct 3, 1989 |
| Priority date | — |
| Expiry date | Sep 24, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/528
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
New type porous cordierite ceramics having a new characteristic interconnecting open cellular structure and a hollow microspherical cordierite glass powder with a shell devoid of any pores or provided with a few or an abundance of open pores which is used as a starting material for the porous cordierite ceramics. The porous cordierite ceramics are produced by subjecting a starting solution containing an alkyl silicate, an aluminum salt and an magnesium salt optionally with other compounds in an organic or aqueous organic solvent to spray thermal decomposition to prepare the hollow microspherical cordierite glass powder, and then processing the cordierite glass powder to a shaped body after or before an optional heat treatment and firing the shaped body at a temperature below the melting point of cordierite. The porous cordierite ceramics are useful as a carrier for gas chromatography or various chemical reactions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.