公开(公告)号：WO2003013211A2

公开(公告)日：2003-02-20

申请号：PCT/EP2002/004371

申请日：2002-04-30

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 and densifying the dry gel to fully dense glass, wherein during the calcination treatment from 350 °C to 900 °C to remove organic impurities in the dry gel, it is carried out at least one reduced-pressure phase at a pressure comprised between about 0.01 and 0.5 bar.

Abstract translation: 通过制备溶胶，凝胶化溶胶，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350℃的煅烧处理 至900℃以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：WO2003013211A3

公开(公告)日：2003-02-20

申请号：PCT/EP2002/004371

申请日：2002-04-30

Applicant: NOVARA TECHNOLOGY S.R.L.

Inventor： COSTA, Lorenzo ,  COSTA, Fulvio ,  CREPALDI, Matteo

IPC: C03B19/12

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 and densifying the dry gel to fully dense glass, wherein during the calcination treatment from 350 °C to 900 °C to remove organic impurities in the dry gel, it is carried out at least one reduced-pressure phase at a pressure comprised between about 0.01 and 0.5 bar.

公开(公告)号：EP1412296A2

公开(公告)日：2004-04-28

申请号：EP02745248.1

申请日：2002-04-30

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 and densifying the dry gel to fully dense glass, wherein during the calcination treatment from 350 °C to 900 °C to remove organic impurities in the dry gel, it is carried out at least one reduced-pressure phase at a pressure comprised between about 0.01 and 0.5 bar.