Mullite bodies and methods of forming mullite bodies
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United States of America Patent
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Jul 22, 2003
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N/A
app pub date -
Aug 29, 2001
filing date -
Aug 27, 1999
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Abstract
A mullite composition is comprised substantially of mullite grains that are essentially chemically bound wherein the composition has at least two adjoining regions that have substantially different microstructures. The composition may be produced by forming a mixture of one or more precursor compounds having the elements present in mullite; shaping the mixture into a porous green shape applying a nucleation control agent to a portion of the porous green shape and then heating the porous green shape under an atmosphere and to a temperature sufficient to form the mullite composition.
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