Title:
光ファイバプレフォームの製造のためのゾル-ゲル法
Document Type and Number:
Japanese Patent JP3977329
Kind Code:
B2
Abstract:
Sol-gel process for the production of optical fiber preforms or overcladdings by preparing a sol, gelling the sol, drying the wet gel to a dry porous gel by supercritical drying and densifying the dry gel to fully dense glass, wherein during the calcination treatment from 350 DEG C to 900 DEG C under pure oxygen or a mixture of oxygen and an inert gas or gases to remove organic impurities in the dry gel, at least one reduced-pressure phase at a pressure comprised between about 0.01 and 0.5 bar is carried out.
More Like This:
| JPH0465327 | PRODUCTION OF OPTICAL QUARTZ FIBER WITH TI DOPED LAYER |
| JPS61111930 | PRODUCTION OF OPTICAL FIBER PREFORM |
| JPS55144439 | PRODUCING GLASS-MELTING CRUCIBLE |
Inventors:
Lorenzo Costa
Fulvio Costa
Matteo Clepardi
Fulvio Costa
Matteo Clepardi
Application Number:
JP2003518244A
Publication Date:
September 19, 2007
Filing Date:
April 30, 2002
Export Citation:
Assignee:
Degussa Novara Technology S.p.A.
International Classes:
C03B37/016; C03B19/12
Domestic Patent References:
| JP5147950A | ||||
| JP2271928A | ||||
| JP63190729A | ||||
| JP59116134A | ||||
| JP7507033A |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard