SINTERING FURNACE AND METHOD FOR PRODUCING SINTERED BODY OF POROUS CERAMIC USING THAT FURNACE

摘要

A firing furnace (10) that seldom breaks down includes a plurality of heater units (25) connected in series to a power supply (26). Each heater unit (25) is formed by two rod heaters (23) connected in parallel to the power supply (26). Even if some of the rod heaters (23) are damaged, the supply of current to all the remaining rod heaters continues. This prevents the temperature in a firing chamber (14) from being lowered.