CRUCIBLE WITH COLLAR AND MANUFACTURE THEREOF

PROBLEM TO BE SOLVED: To prevent the adherence of material scattered from a crucible roundabout to a heater even if it is operated for a long time in a molecular-beam epitaxy and to prevent the trouble due to the creep-up of the material along the inner wall of the crucible. SOLUTION: This crucible...

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Bibliographische Detailangaben
Hauptverfasser:	YANAGISAWA ISAO, ARAI NOBUO, HIRATA KAZUTO, IWAI RYOJI
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE BLASTING CEMENTS CERAMICS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE DIFFUSION TREATMENT OF METALLIC MATERIAL FURNACES FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL KILNS LIGHTING LIME, MAGNESIA MECHANICAL ENGINEERING METALLURGY OPEN SINTERING OR LIKE APPARATUS OVENS REFRACTORIES RETORTS SLAG SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TREATMENT OF NATURAL STONE WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To prevent the adherence of material scattered from a crucible roundabout to a heater even if it is operated for a long time in a molecular-beam epitaxy and to prevent the trouble due to the creep-up of the material along the inner wall of the crucible. SOLUTION: This crucible with a collar has the collar in such a manner that the outer peripheral end of the collar is bent to the body side. The method for manufacturing the molding of the crucible has the steps of depositing the product by CVD reaction on the mandrel made of graphite, and then separating it from the mandrel, wherein the thermal expansion coefficient of the graphite used for the mandrel is 2 to 4×10 / deg.C and the bulk specific gravity is 1.60g/cm or more of isotropy.