发明名称 |
Sol-gel process for the production of optical fiber preforms |
摘要 |
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. |
申请公布号 |
EP1283195(B1) |
申请公布日期 |
2005.10.26 |
申请号 |
EP20010118511 |
申请日期 |
2001.08.01 |
申请人 |
NOVARA TECHNOLOGY S.R.L. |
发明人 |
COSTA, LORENZO;COSTA, FULVIO;CREPALDI, MATTEO |
分类号 |
C03B19/12;C03B37/016;(IPC1-7):C03B19/12 |
主分类号 |
C03B19/12 |
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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