Patent ID: 6391813
Filing Date: 2002-05-21
Classification: C04B

Abstract:
A cordierite ceramic article having cordierite as its primary phase, consisting essentially, by weight on an analytical oxide basis, of about 44-53% SiO2, 30-38% 2O3, 11-16% MgO, and 0.05% to less than about 4% of metal oxides, the metal oxides consisting of tungsten oxide in combination with at least one of molybdenum oxide and bismuth oxide, the article containing no greater than 15% by weight of mullite+spinel+corundum, and the article exhibiting a coefficient of thermal expansion in the range of about 1.5-6.9Ã—10âˆ’7/Â° C. over the temperature range of about 25Â° C. to about 800Â° C.