发明名称 |
METHOD FOR THE FABRICATION OF TRANSPARENT DENSE GLASSES OBTAINED FROM SILICONE ALKOXYDES OR METAL ALKOXYDES BY THE SOL-GEL ROUTE, AND GLASSES OBTAINED ACCORDING TO SUCH METHOD |
摘要 |
The present invention relates to a method for fabricating transparent dense glasses based on metal alkoxydes using the sol-gel route, comprising the following steps: A) a complete hydrolysis of a solution containing one or a plurality of particular metal alkoxydes is carried out in a solvent or a mixture of organic solvents of the alkoxyde(s) by using an aqueous acid solution with a pH lower than 3; the reaction medium does not contain any complexing agent for the metal present in the alkoxyde(s); B) the organic solvent(s) and the residual alcohols are removed, and the resulting solution is concentrated by distillation under primary vacuum conditions so as to obtain a sirupy sol having a concentration of 3-10 moles/l in metal or silicon atoms; C) the sol is appropriately conditioned for the intended application; D) gelling and air drying or drying in an inert atmosphere are carried out at a temperature lower than 70 DEG C; E) the glass may be air annealed or annealed in an inert atmosphere at a temperature lower than 500 DEG C. |
申请公布号 |
WO9425406(A1) |
申请公布日期 |
1994.11.10 |
申请号 |
WO1994FR00513 |
申请日期 |
1994.05.04 |
申请人 |
ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQU;CHAPUT, FREDERIC;GACOIN, THIERRY;BOILOT, JEAN-PIERRE |
发明人 |
CHAPUT, FREDERIC;GACOIN, THIERRY;BOILOT, JEAN-PIERRE |
分类号 |
C03B8/02;C03B19/12;C03C1/00;(IPC1-7):C03C1/00 |
主分类号 |
C03B8/02 |
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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