Production method of ceramic honeycomb structure

摘要

A method for producing a ceramic honeycomb structure having a large number of paths partitioned by porous cell walls, the cell walls having thickness of 0.17-0.45 mm and porosity of 40% or more, comprising the steps of preparing a moldable material comprising a ceramic material powder, a binder, a pore-forming material and water, extruding the moldable material to form a honeycomb-shaped green body, and drying and sintering the green body, the pore-forming material having a melting point of 40-110° C., being solid in the moldable material, and being melted in the drying step so that 25% or more thereof is removed from the green body in the drying step.

主权项

1. A method for producing a ceramic honeycomb structure having a large number of paths partitioned by porous cell walls, said cell walls having a thickness of 0.17-0.45 mm and porosity of 40% or more, comprising the steps of
preparing a moldable material comprising a ceramic material powder, a binder, a pore-forming material and water; extruding said moldable material to form a honeycomb-shaped green body; and drying and sintering said green body, said pore-forming material having a melting point of 40-110° C., being solid in said moldable material, and being melted in said drying step, so that 25-65% of said pore-forming material added is removed from said green body in said drying step, and said ceramic honeycomb structure having an outer diameter of 150 mm or more and a length of 150 mm or more.