Silicon Carbide Based Ceramic Honeycomb Structure And Production Method Therefor

Abstract: This silicon carbide-based ceramic honeycomb structure has a plurality of flow paths penetrating same in an axial direction and separated by partition walls of a silicon carbide-based porous body, and is characterized in that the partition walls have a porosity of 35-50% and a median pore diameter of 8-18 µm, and, in a cross-section of the partition walls perpendicular to the axial direction, when a straight line C passing through the center in a thickness T direction of the partition walls and being parallel to surfaces of the partition walls is drawn, and straight lines that are parallel to the straight line C and that are formed at positions separated from the straight line C by a distance of ±T/5 and ±2T/5 in the thickness direction of the partition walls are drawn, and lengths (pore widths) of pore portions intersected by the straight lines and the number of pores are measured across a predetermined length, an average pore width W that is an average value of the pore widths of all pores measured is 10-25 µm, and the number N of pores per unit length, which is a value obtained by dividing the total number of measured pores by the full length of the straight lines is 20-40 pores/mm.

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