Method for producing cordierite articles
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United States of America Patent
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Aug 25, 1992
Grant Date -
N/A
app pub date -
Nov 21, 1988
filing date -
Nov 21, 1988
priority date (Note) -
Expired
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Abstract
A method of preparing a precursor or cordierite-forming particulate raw material mixture is improved upon by characterizing the talc particles utilized in the raw material mixture in accordance with a Morphology X-ray Diffraction Index or the surface area of the talc particles. Talc particles having a predetermined or desired Morphology X-ray Diffraction Index or surface area are utilized in preparing the raw material mixture. A cordierite article is produced having pores therethrough, which pores have shapes that are 'blocky' or 'platy' as a result of the talc morphology. 'Platy' pores in the fired cordierite article result in higher Water Absorption values and an increase in coatability by high surface area washcoat and catalyst; conversely, 'blocky' pores result in lower Water Absorption values and a decrease in coatability by high surface area washcoat and catalyst.
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