Claims
- 1. 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% <Al2O3, 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 1.5-6.9×10−7/° C. over the temperature range of about 25° C. to about 800° C.
- 2. A cordierite ceramic article in accordance with claim 1 having a transverse I-ratio in the range of 0.55 to 0.68.
- 3. A cordierite ceramic article in accordance with claim 1 having a coefficient of thermal expansion no greater than about 5.0×10−7/° C.
- 4. A cordierite ceramic article in accordance with claim 1 wherein the metal oxides include at least 0.05% molybdenum oxide, and wherein the cordierite ceramic article has a honeycomb, plate, or sheet form.
Parent Case Info
This application claims the benefit of U.S. Provisional Application No. 60/114,420, filed Dec. 31, 1998, entitled “Low Sintering Temperature Cordierite Batch and Cordierite Ceramic Produced Therefrom”, by Gregory A. Merkel.
US Referenced Citations (13)
Foreign Referenced Citations (4)
Number |
Date |
Country |
19849340 |
Apr 1999 |
DE |
51037908 |
Mar 1976 |
JP |
58079869 |
May 1983 |
JP |
07196363 |
Aug 1995 |
JP |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/114420 |
Dec 1998 |
US |