| 摘要 |
This invention is directed to the making of ceramic articles through extrusion utilizing a self-cleaning, intermeshing, co-rotating, twin screw extrusion apparatus. The invention is particularly directed to the extrusion of honeycomb structures wherein the batch consists of cordierite or cordierite-mullite compositions with water and a hydroxypropyl cellulose binder/plasticizer having a viscosity at 20 DEG C. in a 2% aqueous solution between 25,000-100,000 centipoises. Preferably, the hydroxypropyl cellulose will have a viscosity of at least 50,000 centipoises such as to permit a working temperature during operation of the extrusion apparatus of at least 40 DEG C.
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