发明名称 |
PROCESS FOR MOLDING ARTICLE INCLUDING HEAT TREATMENT GASEOUS PHASE REACTION |
摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a silica-coated clad tube as a precursor of an optical fiber wherein processing accompanying a homogeneous gaseous reaction product and heating are promoted because concentration on a cold surface is controlled, which method is applicable to the heating of a sol-gel tube and other substrates. SOLUTION: Pipe-shaped muffle furnace 10 with an open end is provided with a tube 11 or other substrate and a cylindrical shield 12 for shielding heat and gas, and a door 13. The tube 11 in the furnace 10 which is closed with the door at the open end is heated and processed with a gas stream through a feed hole 14. The heat at the door is controlled with the shield 12, by which O-ring 16 is maintained to perfection. Other example shows that a counterdiffusion of both a process gas from the tube 11 and a concentratable material toward the door is controlled with the shield 12. |
申请公布号 |
JP2001240423(A) |
申请公布日期 |
2001.09.04 |
申请号 |
JP20000399713 |
申请日期 |
2000.12.28 |
申请人 |
LUCENT TECHNOL INC |
发明人 |
MIXON DAVID A;MONBERG ERIC M;TREVOR DENNIS J |
分类号 |
G02B6/00;C03B19/12;C03B19/14;C03B37/014;C03B37/025;F27B9/08;F27D5/00;F27D7/02;(IPC1-7):C03B37/014 |
主分类号 |
G02B6/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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