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

1998-09-22

2000-06-27

Speer, Timothy M.

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Producing article having plural hollow channels

26417712, B28B 100

Patent

active

060803568

ABSTRACT:
A cordierite honeycomb structure having a coefficient of thermal conductivity of not less than 0.035 J/cm..degree.K.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 to 800.degree.0 C. is described. 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; 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%.

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