Patent ID: 11932582
Assignee: CORNING INCORPORATED
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A honeycomb firing method, comprising:
providing a green honeycomb body comprising a honeycomb structure with a matrix of intersecting walls having an interior portion, and having a skin disposed on at least a portion of an outer periphery of the matrix; and
firing the green honeycomb body in a furnace;
wherein firing comprises:
ramping up, at a first rate, a temperature in the furnace to reach a first temperature,
after reaching the first temperature, ramping up, at a second rate, the temperature in the furnace to reach a spike temperature,
after reaching the spike temperature, ramping down, at a third rate, the temperature in the furnace to reach a soak temperature,
after reaching the soak temperature, maintaining the soak temperature for a predetermined period of time; and
after the predetermined period of time, ramping down, at a fourth rate, the temperature in the furnace from the soak temperature to a handling temperature, and

wherein, after firing, the interior portion of the matrix has a first average bulk porosity, and the skin has a second average bulk porosity that is less than the first average bulk porosity.