METHOD FOR PRODUCING COMPONENT OF RARE EARTH METAL-DOPED QUARTZ GLASS

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PROBLEM TO BE SOLVED : To provide a method for producing rare earth metal-doped quartz glass with reproducible properties. SOLUTION : A method for producing a component comprised of a rare earth metal-doped quartz glass is provided in which an intermediate product containing a void and composed of a SiO2 raw material doped with a rare earth metal is introduced into a sinter mold the interior of which is bordered by a carbonaceous mold wall, and is melted therein into the component by gas pressure sintering at a maximum temperature above 1500°C, with a shield arranged between the mold wall and the intermediate product. A bulk material of amorphous SiO2 particle with a layer thickness of at least 2 mm is used as the shield, the softening temperature thereof being at least 20°C higher than the softening temperature of the doped SiO2 raw material, and the bulk material being gas-permeable at the beginning of the melting of the intermediate product, and the bulk material sintering during melting into an outer layer that is gas-tight to a pressure gas. SELECTED DRAWING : None COPYRIGHT : (C)2019, JPO&INPIT