| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of producing SiO<SB>2</SB>-TiO<SB>2</SB>based glass which enables production of SiO<SB>2</SB>-TiO<SB>2</SB>based glass which is less expandable, has neither micro bubbles nor striae, and is suitable as a member for the reflecting optical system. SOLUTION: The method of producing SiO<SB>2</SB>-TiO<SB>2</SB>based glass comprises adding a predetermined percentage of titanium tetrachloride to a SiO<SB>2</SB>powder having a particle size of 1-1,000μm, subjecting these components to heat treatment in an oxidative atmosphere after mixing or while mixing these components, charging the resulting heat-treated powder into a carbon mold in a reduced pressure furnace, and melting the powder at 10 toll or less. COPYRIGHT: (C)2007,JPO&INPIT
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