Abstract: A firing furnace comprising: a muffle formed so as to ensure a space for housing a formed body to be fired; a member that constitutes a heat generator and is placed on and/or around the muffle; and a heat insulating layer that contains said muffle and said heat generator inside thereof, wherein a carbon-natured sheet is placed in the vicinity of corner portions of an inner face of said heat insulating layer.

Abstract: A stopping member includes a shaft rod and a stopper. The stopper is provided at an end of the shaft rod. The shaft rod and the stopper are arranged so that the stopping member forms a substantially linear shape upon passing through a through hole provided in a heat insulating layer which is provided to enclose a heater and a muffle to accommodate a ceramic molded body in a firing furnace. The stopper is configured to extend in a direction substantially perpendicular to the shaft rod so as to fix the heat insulating layer after the end of the shaft rod has passed through the through hole.

Abstract: A manufacturing method for producing a ceramic member by firing a formed body with a firing furnace. The firing furnace is equipped with 1) a muffle formed in a manner so as to ensure a space for housing the formed body to be fired; 2) a heater or a heat generator serving as the heater, which is placed outside the muffle; and 3) a plurality of heat insulating layers made of carbon, fixed by stoppers made of carbon, and formed in a manner so as to enclose the heater or the heat generator. The method fires the formed body with the firing furnace to form the ceramic member, and heats the muffle and the space for housing the formed body with the heater or the heat generator.

Abstract: A firing furnace according to the present invention comprises: a muffle formed in a manner so as to ensure a space for housing a formed body to be fired; a heater or a heat generator serving as the heater, placed outside the muffle; and a plurality of heat insulating layers formed in a manner so as to enclose said muffle and said heater therein, wherein said heat insulating layers are made of carbon and fixed by stoppers made of carbon.

Abstract: A firing furnace comprising: a muffle formed so as to ensure a space for housing a formed body to be fired; a member that constitutes a heat generator and is placed on and/or around the muffle; and a heat insulating layer that contains said muffle and said heat generator inside thereof, wherein a carbon-natured sheet is placed in the vicinity of corner portions of an inner face of said heat insulating layer.