| abstract |
A ceramic honeycomb catalyst carrier, characterized in that it has a porosity of 20 % or less and has an average surface roughness Ra of partition walls of a large value of 0.5 νm or more; and a method for preparing the ceramic honeycomb catalyst carrier which comprises providing a dried ceramic honeycomb by forming a ceramic material followed by drying, exposing the dried ceramic honeycomb to a gas stream containing abrasive grains dispersed therein, to thereby render the surface of the partition walls of the dried ceramic honeycomb to be rough, and then firing the dried ceramic honeycomb, or which comprises providing a fired ceramic honeycomb by forming a ceramic material followed by drying and firing, and then exposing the resultant fired ceramic honeycomb to a gas or water stream containing abrasive grains dispersed therein, to thereby render the surface of the partition walls of the fired ceramic honeycomb to be rough. |