MANUFACTURING METHOD OF CERAMIC HONEYCOMB FILTER AND CERAMIC HONEYCOMB FILTER

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of a ceramic honeycomb filter where cracks are hardly caused at a partition wall intersection part in the vicinity of the inner end surface of the flow passage of a sealing part and thermal shock resistance is kept even when thermal shock acts at the time of regenerating a filter and the like and to provide the ceramic honeycomb filter.;SOLUTION: In a method for forming a sealing part where a sealing material is introduced into the prescribed flow passage of a cordierite ceramic honeycomb structure obtained by performing first firing and dried and second firing is performed, the sealing material has ceramic particles consisting of a cordierite-blended raw material blended so as to become cordierite after the second firing of 20-50 mass% and preliminarily fired cordierite-fired powders of 50-80 mass% and a pore-forming material of 0.5-20 pts.mass to 100 pts.mass of the ceramic particles, the cordierite-blended raw material has a median particle diameter of 3-10 μm and a D90 of 25 μm or less, the cordierite-fired powders have a median particle diameter of 100-180 μm and the pore-forming material has a median particle diameter of 35-55 μm.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT