Mullite bodies and methods of forming mullite bodies

Details Mullite bodies and methods of forming mullite bodies Mullite bodies and methods of forming mullite bodies

2011-05-24

2011-05-24

Green, Anthony J (Department: 1731)

Compositions: ceramic

Ceramic compositions

Refractory

C501S080000, C264S629000, C264S630000, C264S631000

Reexamination Certificate

active

07947620

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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