Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By mechanically introducing gas into material
Patent
1988-11-21
1992-08-25
Derrington, James
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By mechanically introducing gas into material
501118, 501119, C04B 3514
Patent
active
051416867
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.
REFERENCES:
patent: 4280845 (1981-07-01), Matsuhisa
patent: 4851376 (1989-07-01), Asami et al.
Corning Incorporated
Derrington James
Levin Gary H.
Wardell Richard N.
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