| 摘要 |
An electron bombardment heating apparatus, in which thermions emitted from filaments 9 are accelerated and impinged upon a heating plate 2 , so as to heat the heating plate 2 , wherein a periphery wall of a heated material supporting member 1 having a heating plate as a ceiling thereof is made up with multi-staged periphery wall portions 13 a and 13 b, being piled up vertically and different in the radius thereof, and those periphery wall portions 13 a and 13 b are connected with each other by means of a ring-like horizontal wall 5 . With this, thermal stress can be mitigated, which is caused due to the difference of temperature between the lower end portion of the heated material supporting member 1 and the heating plate 2 when heating up the heating plate 2 , thereby bringing about no breakage in the heated material supporting member if conducting heating and cooling upon the heating plate, repetitively.
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