Mullite bodies and methods of forming mullite bodies
US7947620B2 · kind B2 · utility
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21References
24Claims
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Key dates
| Filing date | Jul 25, 2008 |
| Grant date | May 24, 2011 |
| Priority date | — |
| Expiry date | Jun 10, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/96
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of forming a porous mullite composition of acicular mullite grains having improved properties is described, where the mullite is formed at some time in the presence of a fluorine containing gas. For example, it has been discovered that improved properties may result from heating the mullite to a high temperature in an atmosphere selected from the group consisting of water vapor, oxygen, an inert gas or mixtures thereof or forming the mullite composition from precursors having an Al/Si ratio of at most 2.95.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.