Patent ID: 11872721
Assignee: NGK INSULATORS, LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  F | IPC B  C  F

Claim 0:
1. A method for producing a conductive honeycomb structure, the method comprising:
a forming step of extruding a forming raw material containing a conductive ceramic raw material to obtain a honeycomb formed body, the honeycomb formed body comprising: an outer peripheral wall; and a partition wall disposed on an inner side of the outer peripheral wall, the partition wall defining a plurality of cells to form a flow passage extending from one end face to an other end face;
a drying step of drying the honeycomb formed body to obtain a honeycomb dried body; and
a firing step of firing the honeycomb dried body to obtain a honeycomb fired body,
wherein the forming step comprises a step of controlling a volume fraction of a portion that can form pores of the honeycomb formed body so that an absolute value of a difference in the volume fraction of the portion that can form the pores in predetermined regions of the honeycomb formed body relative to a previously set, predetermined porosity of the honeycomb fired body is within 0.5%; and
wherein the predetermined porosity is a porosity preset for each of the predetermined regions in a cross section perpendicular to a flow passage direction of the cells of the honeycomb fired body.