SiO₂-TiO₂-BASED GLASS PRODUCTION METHOD, PRODUCTION METHOD FOR PLATE-SHAPED MEMBER COMPRISING SiO₂-TiO₂-BASED GLASS, PRODUCTION DEVICE, AND SiO₂-TiO₂-BASED GLASS PRODUCTION DEVICE

摘要

A SiO₂-TiO₂-based glass production method in which a direct method is used to produce SiO₂-TiO₂-based glass on an object includes: a first step in which an object is preheated; and a second step in which a prescribed length of SiO₂-TiO₂-based glass ingot is grown on the preheated object. The object is heated in the first step such that the temperature of the glass-ingot growth surface is maintained at at least a prescribed lower-limit temperature in the second step.