| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for producing a synthetic quartz glass ingot by which the yield is not decreased even if the amount of fed raw material is increased to improve the volume of the production. SOLUTION: This method for producing the synthetic quartz glass ingot by supplying a silicon compound gas together with oxygen gas as a carrier to a quartz glass burner to jet from the center nozzle, accumulating silica particles formed by the gas-phase hydrolysis by oxyhydrogen flame on a target, and melting the accumulated silica particles to form a molten glass, is carried out by regulating the flow velocity of a mixed gas of the silicon compound gas with the oxygen gas as the carrier, gushed from the center nozzle of the quartz glass burner so as to be 20-40 m/s, and the molar ratio of the silicon compound gas to the oxygen gas as the carrier gas so as to be (1:1)-(1:2).</p> |
