Firing furnace, manufacturing method of a ceramic member using the firing furnace, ceramic member, and ceramic honeycomb filter

A manufacturing method for producing a ceramic member in a firing furnace including a muffle and a space for housing a formed body to be fired inside the muffle, a heater or a heat generator serving as the heater and placed outside the muffle, and a plurality of heat insulating carbon layers, fixed by carbon stoppers, and enclosing said heater or said heat generator,

• said method comprising:
• a step of firing the formed body with the firing furnace to form said ceramic member;
• and
• a step of heating said muffle and said space for housing the formed body while suppressing with said plurality of heat insulating carbon layers a temperature increase on outer ones of the heat insulating carbon layers and while fixing the plurality of heat insulating carbon layers with the carbon stoppers.