Mullite bodies and methods of forming mullite bodies
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United States of America Patent
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May 24, 2011
Grant Date -
Nov 27, 2008
app pub date -
Jul 25, 2008
filing date -
Mar 25, 2002
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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.
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