METHOD FOR MOLDING QUARTZ GLASS MATERIAL USING MOLD MATERIAL

PROBLEM TO BE SOLVED: To mold a quartz glass material into a predetermined shape without incorporation of cracks or bubbles by constituting a mold-releasing material by a simple work. SOLUTION: In a method for molding a quartz glass material using a mold material for molding the quartz glass material into a rough shape of a glass product by heating and melting the glass material in the mold material, a carbon mold material, in which an alumina film is formed on a surface brought into contact with a heated and molten quartz glass material by applying an alumina (Al2O3) slurry on the surface and drying the applied slurry, is used, and then the quartz glass material is placed in the mold material, and heated and melted in the mold material so as to be molded into the rough shape of the glass product. COPYRIGHT: (C)2010,JPO&INPIT