Carbon heater, heater unit, firing furnace and method for producing porous ceramic fired body containing silicon

摘要

An object of the present invention is to provide a carbon heater which is prevented from degradation, and thereby has a reduced risk of breakage and a lengthened life; a heater unit; a firing furnace; and a method for manufacturing a silicon-containing porous ceramic fired body. The carbon heater of the present invention is a carbon heater used to fire a silicon-containing material in a non-oxidizing atmosphere, including a cross-sectional shape of a substantially n-sided polygon, wherein n represents any one of 3 to 8.