CERAMIC HONEYCOMB STRUCTURE AND METHOD OF MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a ceramic honeycomb structure having excellent thermal shock resistance and outer diameter dimensional accuracy and a method of manufacturing the same.

SOLUTION: The ceramic honeycomb structure 1 comprises a cordierite ceramic having an outer peripheral skin part 2 provided on the outer periphery in the diameter direction and a cell wall 3 forming a honeycomb like cell 11 inside the outer peripheral skin part 2. The ratio A/B of the degree A of crystal orientation of the cordierite ceramic in the cell wall 3 to the degree B of crystal orientation of the cordierite ceramic in the outer peripheral skin part 2 is 0.80-1.25. In the manufacture of the ceramic honeycomb structure 1, the relation between the temperature T1 at the center part of a base material and the temperature T2 at the outer peripheral edge part of the base material in drying a honeycomb formed body 10 formed by extrusion satisfies T1>T2 in≥50% of a time required from the starting of temperature rising till the temperature T1 reaches 95°C.

COPYRIGHT: (C)2006,JPO&NCIPI