Patent ID: 8398797
Filing Date: 2013-03-19
Classification: B01D,C04B

Abstract:
1. A method for producing a cordierite-based ceramic honeycomb filter comprising the steps of introducing a plugging material into predetermined flow paths of a sintered, cordierite-based ceramic honeycomb having an outer diameter of 150 mm or more, and drying and sintering the resultant plugs, said sintering step comprising a temperature-elevating process, a temperature-keeping process and a temperature-lowering process, and said temperature-elevating process having a temperature-elevating speed of 100-500° C./hr from 800° C. to the highest keeping temperature, wherein said plugging material consists essentially of cordierite-forming materials, a binder, a lubricant and water, and wherein said cordierite-forming materials contain 5-22% by mass of silica having an average particle size of 10-25 μm, and wherein said plugs are heated faster in a portion near a cell wall than in an inside portion distant from said cell wall.