To improve working efficiency in a high-frequency heating oven for heating ceramic or the like.
The high-frequency heating oven 30 comprises a heating oven 40 having a refractory for demarcating the accommodation space of a crucible 35 inside, and a high-frequency coil section 31 for surrounding the heating oven 40. The refractory of the heating oven 40 is formed in a double wall structure comprising an inner-layer section 43 that is made of carbide-family silicon carbide and an outer-layer section 45 made of mullite. Further, the outer-layer section 45 is connected and fixed to a plurality of posts 51 made of a carbon fiber-reinforced carbonaceous material that are arranged with a gap in the circumferential direction around the outer-layer section 45 via a bolt. The heating oven 40 is separated from the high-frequency coil section 31 in terms of structure, and the heating oven 40 is in a self-supporting structure.
MATSUI TOSHIHIRO
TOKUNAGA KAZUTOSHI
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