| 摘要 |
The present invention relates to a crucible having high strength and high efficiency, which is made from Ta, W, Ni, stainless (STS), glass, quartz, ceramic, and graphite. The crucible includes a cylindrical structure having bent portions at regular intervals in a vertical direction, wherein a surface area of a circumferential surface receiving radiant heat is increased to melt a molten material by consuming minimum electrical power, and also to reinforce the cylindrical structure against expanded deformation, thereby extending the lifespan thereof, shortening working hours, and reducing a loss of reprocessing a product. Since the crucible is manufactured to have a thin thickness due to the high strength, material costs can be reduced. Also, surface cleaning is improved by performing a sanding process on the surface of the crucible, and the contact surface area with the molten material is increased, thereby reducing wettability of molten residues for minimizing deformation of the crucible occurring at condensation. |
