公开(公告)号：EP1283195A1

公开(公告)日：2003-02-12

申请号：EP01118511.3

申请日：2001-08-01

Applicant: Novara Technology S.R.L.

Inventor： Costa, Lorenzo ,  Costa, Fulvio ,  Crepaldi, Matteo

IPC: C03B19/12 ,  C03B37/016

CPC classification number: C03C3/04 ,  C03B19/12 ,  C03B37/016 ,  C03C13/00

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°C to 900°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.

Abstract translation: 用于通过制备溶胶，凝胶化溶胶，通过超临界干燥将湿凝胶干燥成干多孔凝胶并将干凝胶致密化成完全致密玻璃的溶胶 - 凝胶法，其中在煅烧处理期间 在纯氧气或氧气和惰性气体或气体的混合物中在350℃至900℃下除去干凝胶中的有机杂质，在约0.01至0.5巴之间的压力下进行至少一个减压相 。

公开(公告)号：EP1283195B1

公开(公告)日：2005-10-26

申请号：EP01118511.3

申请日：2001-08-01

Applicant: Novara Technology S.R.L.

Inventor： Costa, Lorenzo ,  Costa, Fulvio ,  Crepaldi, Matteo

IPC: C03B19/12 ,  C03B37/016

CPC classification number: C03C3/04 ,  C03B19/12 ,  C03B37/016 ,  C03C13/00