Cordierite honeycomb structure and process for producing the sam

Details Cordierite honeycomb structure and process for producing the sam Cordierite honeycomb structure and process for producing the sam

1995-08-25

1998-12-15

Speer, Timothy M.

Stock material or miscellaneous articles

Structurally defined web or sheet

Honeycomb-like

428702, B32B 312

Patent

active

058493913

ABSTRACT:
A cordierite honeycomb structure having a coefficient of thermal conductivity of not less than 0.035 J/cm.multidot..degree.K..multidot.sec, a porosity of not more than 16%, and a coefficient of thermal expansion of not more than 1.0.times.10.sup.-6 /.degree.C. at 40.degree. to 800.degree. C. A process for producing a cordierite honeycomb structures, involves at least the steps of: mixing powders of kaolin, talc, and other starting materials for cordierite together so as to provide a chemical composition of cordierite; and extruding the mixture; and firing the extrudate, wherein the kaolin has an average particle diameter of not more than 5 .mu.m and such a particle size distribution that the proportion of particles with diameters of less than 1 .mu.m is 10% by weight and the talc has an average particle diameter of not more than 10 .mu.m and such a particle size distribution that the proportion of particles with diameters of less than 1 .mu.m is not more than 5%.

REFERENCES:
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patent: 4327188 (1982-04-01), Endo
patent: 4657880 (1987-04-01), Lachman
patent: 4849275 (1989-07-01), Hamaguchi
patent: 4869944 (1989-09-01), Harada
patent: 5545243 (1996-08-01), Kotani

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