Patent number: 7485594
Abstract: A porous mullite composition is made by forming a mixture of one or more precursor compounds having the elements present in mullite (e.g., clay, alumina, silica) and a property enhancing compound. The property enhancing compound is a compound having an element selected from the group consisting of Mg, Ca, Fe, Na, K, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, B, Y, Sc, La and combination thereof. The mixture is shaped and to form a porous green shape which is heated under an atmosphere having a fluorine containing gas to a temperature sufficient to form a mullite composition comprised substantially of acicular mullite grains that are essentially chemically bound.
Type:
Grant
Filed:
May 1, 2007
Date of Patent:
February 3, 2009
Assignee:
Dow Global Technologies, Inc.
Inventors:
Chandan Saha, Sharon Allen, Chan Han, Robert T. Nilsson, Arthur R. Prunier, Jr., Aleksander J. Pyzik, Sten A. Wallin, Robin Ziebarth, Timothy J. Gallagher
Publication number: 20070213207
Abstract: A porous mullite composition is made by forming a mixture of one or more precursor compounds having the elements present in mullite (e.g., clay, alumina, silica) and a property enhancing compound. The property enhancing compound is a compound having an element selected from the group consisting of Mg, Ca, Fe, Na, K, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, B, Y, Sc, La and combination thereof. The mixture is shaped and to form a porous green shape which is heated under an atmosphere having a fluorine containing gas to a temperature sufficient to form a mullite composition comprised substantially of acicular mullite grains that are essentially chemically bound.
Type:
Application
Filed:
May 1, 2007
Publication date:
September 13, 2007
Inventors:
Chandan Saha, Sharon Allen, Chan Han, Robert Nilsson, Arthur Prunier, Aleksander Pyzik, Sten Wallin, Robin Ziebarth, Timothy Gallagher
Publication number: 20070203315
Abstract: A porous mullite composition is made by forming a mixture of one or more precursor compounds having the elements present in mullite (e.g., clay, alumina, silica) and a property enhancing compound. The property enhancing compound is a compound having an element selected from the group consisting of Mg, Ca, Fe, Na, K, Ce, Pr, Nd, Sm, Eu, Gd, Th, Dy, Ho, Er, Tm, Yb, Lu, B, Y, Sc, La and combination thereof. The mixture is shaped and to form a porous green shape which is heated under an atmosphere having a fluorine containing gas to a temperature sufficient to form a mullite composition comprised substantially of acicular mullite grains that are essentially chemically bound.
Type:
Application
Filed:
May 1, 2007
Publication date:
August 30, 2007
Inventors:
Chandan Saha, Sharon Allen, Chan Han, Robert Nilsson, Arthur Prunier, Aleksander Pyzik, Sten Wallin, Robin Ziebarth, Timothy Gallagher
Publication number: 20060197265
Abstract: A porous mullite composition is made by Forming a mixture of one or more precursor compounds having the elements present in mullite (e.g., clay, alumina, silica) and a property enhancing compound. The property enhancing compound is a compound having an element selected from the group consisting of Mg, Ca, Fe, Na, K, Ce, Pr, Nd, Sm, Eu, Gd, Th, Dy, Ho, Er, Tm, Yb, Lu, B, Y, Sc, La and combination thereof. The mixture is shaped and to form a porous green shape which is heated under an atmosphere having a fluorine containing gas to a temperature sufficient to form a mullite composition comprised substantially of acicular mullite grains that are essentially chemically bound.
Type:
Application
Filed:
April 23, 2004
Publication date:
September 7, 2006
Inventors:
Chandan Saha, Sharon Allen, Chan Han, Robert Nilsson, Arthur Prunier, Aleksander Pyzik, Sten Wallin, Robin Ziebarth, Timothy Gallagher