Title:
APPARATUS FOR SINTERING POROUS GLASS PREFORM AND SINTERING
Document Type and Number:
Japanese Patent JP3169357
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide both an apparatus for sintering a porous glass preform capable of suppressing a difference in refractive index in the interior of a clad when sintering the porous glass preform and dehydrating and transparently vitrifying the porous glass preform and a method for sintering the porous glass preform.
SOLUTION: This apparatus 1 for sintering a porous glass preform 2 comprises a furnace core tube 12 comprising the porous glass preform 2 inserted thereinto and connected to an axial rod 18 and having a gas introduction tube 11 connected to a gas passage 3 for a dehydrating reaction and an inert gas passage 8 and further a heating source 13 capable of sintering the porous glass preform 2 which is lowering while rotating with a motor 19 connected to the axial rod 18 and arranged in the outer periphery of the furnace core tube 12. In this case, flow control valves 4 and 9 arranged in the course of the gas passage 3 for the dehydrating reaction and the inert gas passage 8 are connected to a flow rate control circuit 7 and the motor 19 is connected to a lowering speed control circuit 20. The heating source 13 is connected to a temperature control circuit 15.
Inventors:
Go Kamio
Hiroyuki Koide
Hiroshi Tsumura
Tadakatsu Shimada
Hideo Hirasawa
Hiroyuki Koide
Hiroshi Tsumura
Tadakatsu Shimada
Hideo Hirasawa
Application Number:
JP6594899A
Publication Date:
May 21, 2001
Filing Date:
March 12, 1999
Export Citation:
Assignee:
Shin-Etsu Chemical Co., Ltd.
International Classes:
C03B8/04; C03B37/014; (IPC1-7): C03B8/04
Domestic Patent References:
| JP2204338A |
Attorney, Agent or Firm:
Yoshio Komiya