| 摘要 |
Porous sintered ceramic materials having mullite as its primary phase and a method for producing them. The method includes preparing a plasticizable raw material mixture comprised, by weight, of 75-99% of the mullite powder and 1.0 to 25% of the water swelling clay and 5-25% of the alumina and/or alumina-yielding precursor, adding an organic binder system to the mixture and mixing the mixture to form an extrudable mixture, and extruding the mixture to form a substrate of the desired configuration. The green body is dried and fired for a time and at temperature sufficient to form a sintered mullite structure having an acid/base exposure strength loss of less than about 20%.
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