| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a glass rod-like body by which the deposition rate of glass fine particles on the outer periphery of a starting member is improved to efficiently manufacture the glass rod-like body such as an optical fiber preform without degrading the quality. SOLUTION: In the synthesis of the glass particles by introducing SiCl<SB>4</SB>gas, Ar gas, H<SB>2</SB>gas and O<SB>2</SB>gas into a multiple pipe burner 1 provided with a 1st multiple pipe 2, nozzles 3, 3 ... and a 2nd multiple pipe 4 and hydrolyzing or oxidizing SiCl<SB>4</SB>gas in flame produced by the reaction of H<SB>2</SB>gas with O<SB>2</SB>gas, the ratio A/B of H<SB>2</SB>gas flow rate A to O<SB>2</SB>gas flow rate B is controlled to satisfy a relation of 2.5≤A/B≤4.5. COPYRIGHT: (C)2006,JPO&NCIPI
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