| 摘要 |
PURPOSE:To provide the titled treating apparatus composed of a separable sealed vessel for holding the component having high dissociation pressure, a solid or liquid sealant applied to the joint of the separable vessel, and a means for imposing a stress to the joint part, thereby facilitating the balancing of the pressure between the inner and the outer parts of the vessel. CONSTITUTION:The titled apparatus is composed of the upper vessel 1 made of Mo and the lower vessel made of Al2O3. Liquid B2O3 is put into the liquid sealant-holding part 3 of the vessel 2, and the lower end of the upper vessel is dipped into the liquid and made to be contacted with the lower vessel under a proper stress, wherein said vessel 2 is supported elastically with the coil spring 8 having a spring constant to apply the stress of 20-30kg/cm<2> at the contact part. Ga and As are charged in a crucible, GaAs is synthesized directly in the sealed vessel, and the growth of the GaAs single crystal is carried out keeping the pressure of As at a definite level. The breakage of the vessel, the clouding of the optical window 9 and the loss of As before or after the pulling operation can be prevented by this process. For example, graphite can be used as the solid sealant 12.
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