Patent ID: 9726066
Date: 2017-08-08
CPC Classifications: B01D,B01J,B28B,C04B,F01N

Claim:
1. A method for producing a cordierite-type ceramic honeycomb structure comprising the steps of extruding a moldable material comprising a ceramic material and a pore-forming material constituted by hollow resin particles coated with inorganic powder to form a predetermined green body, and drying and sintering said green body; said moldable material comprising 8-16% by mass of said pore-forming material per 100% by mass of said ceramic material; said pore-forming material having a median diameter D said pore-forming material having the maximum compression recovery Lmax of 3.0 mm or more, and a compression recovery L in a compression stress range of 2-6 MPa, which is 80% or more of said maximum compression recovery Lmax, the compression recovery L being defined by the returning distance (mm) of a piston having an outer diameter of 8 mm applying a predetermined compression stress to 0.3 g of a pore-forming material in a metal cylinder having an inner diameter of 8 mm and a depth of 100 mm, when the pore-forming material is relieved of the compression stress, and the maximum compression recovery Lmax being the maximum of the compression recovery L.