SINGLE-FIRE TWO-STEP SOAK METHOD

摘要

A method for making a cordierite filter article, including: firing an extruded green body batch composition according to: a first temperature ramping from ambient temperature up to a first soaking temperature; a first soaking at a temperature of at least 1255° C. for at least 2 hours; a second temperature ramping from the first soak temperature down to a second soak temperature; and a second soaking at a temperature of at least 1250° C. and at least 5° C. below the first soaking temperature, as defined herein.