公开(公告)号：EP1606222A1

公开(公告)日：2005-12-21

申请号：EP04719966.6

申请日：2004-03-12

申请人： Degussa Novara Technology S.P.A.

发明人： BOARA, Giulio ,  PEDRETTI, Simone ,  RÜCKEMANN, Andreas ,  SPARPAGLIONE, Massimo

IPC分类号： C03B19/12

CPC分类号： C04B35/14 ,  C03B19/12 ,  C04B35/624 ,  C04B35/6268 ,  C04B2235/3287 ,  C04B2235/441 ,  C04B2235/444 ,  C04B2235/6023 ,  C04B2235/606 ,  Y02P40/57

摘要： Particularly shaped articles constituted by silicon oxide, as such or with suitable additives, prepared by room temperature molding according to a process comprising: preparation of a sol starting from a silicon alcoxide, or from a silicon alcoxide and at least a precursor of at least one of the additional elements; hydrolysis of the sol obtained thereby; addition of colloidal silica; pouring the resulting mixture into the desired mould; sol gelling and fast removal of the solid product; gel drying; gel densification by means of a thermal treatment at temperature ranging from 900 °C to 1500 °C. The articles can be used as preforms for the optical fiber spinning.

公开(公告)号：EP1858815A1

公开(公告)日：2007-11-28

申请号：EP06708245.3

申请日：2006-02-14

申请人： Degussa Novara Technology S.p.A.

发明人： BOARA, Giulio ,  COSTA, Fulvio ,  RÜCKEMANN, Andreas

IPC分类号： C03B19/12 ,  C03B37/016 ,  C03C1/00 ,  C03C3/06 ,  B01J13/00 ,  C01B33/158

CPC分类号： C03B19/12 ,  B01J13/0091 ,  C03B2201/03 ,  C03C1/006 ,  C03C2203/20 ,  C03C2203/26 ,  C03C2203/30 ,  C03C2203/34

摘要： Process for the production of monoliths of glass by means of the sol-gel process, comprising the following steps: a) dispersion in water of an oxide prepared by the pyrogenic route, b) hydrolysis of an alkoxide in aqueous solution to form a hydrolysate, c) mixing of the hydrolysate of the alkoxide with the oxide prepared by the pyrogenic route to form a colloidal sol, d) optional removal of coarse contents from the colloidal sol, e) gelling of the colloidal sol in a mould, f) replacement of the water contained in the resulting aerogel by an organic solvent, g) drying of the aerogel, h) heat treatment of the dried aerogel.

摘要翻译： 该方法包括以下步骤：a）通过热解途径制备的氧化物在水中的分散，b）醇盐在水溶液中的水解以形成水解产物， c）将醇盐的水解产物与通过热解途径制备的氧化物混合以形成胶体溶胶，d）任选地从胶体溶胶中除去粗颗粒，e）胶体溶胶在模具中胶凝，f） 所得到的气凝胶中含有的有机溶剂中的水，g）气凝胶的干燥，h）干燥后的气凝胶的热处理。

公开(公告)号：EP1868949A1

公开(公告)日：2007-12-26

申请号：EP06708105.9

申请日：2006-02-08

申请人： Degussa Novara Technology S.p.A.

发明人： COSTA, Fulvio ,  BOARA, Giulio ,  RÜCKEMANN, Andreas

IPC分类号： C03B19/12 ,  C03B20/00 ,  C03C1/00 ,  C03C3/06

CPC分类号： C03B19/12 ,  C03B2201/03 ,  C03C1/006 ,  C03C3/06 ,  C03C2201/02 ,  C03C2203/22 ,  C03C2203/26 ,  C03C2203/52

摘要： Process for the production of monoliths by means of the sol-gel process, comprising the following steps: a. hydrolysis of an alkoxide in aqueous solution to form a hydrolysate and optionally evaporation to optimum concentration of the same, b. addition of an oxide prepared by the pyrogenic route, c. mixing of the hydrolysate of the alkoxide with the oxide prepared by the pyrogenic route to form a colloidal sol, d. optional removal of coarse contents from the colloidal sol, e. gelling of the colloidal sol in a mould, f. optional replacement of the water contained in the resulting aerogel by an organic solvent, g. drying of the aerogel, h. heat treatment of the dried aerogel, the coarse content being removed from the colloidal sol.

公开(公告)号：EP2064159A1

公开(公告)日：2009-06-03

申请号：EP07802724.0

申请日：2007-08-20

申请人： Degussa Novara Technology S.p.A.

发明人： COSTA, Lorenzo ,  BOARA, Giulio ,  RÜCKEMANN, Andreas

IPC分类号： C03C1/00 ,  C03C3/06 ,  C01B33/158 ,  C03B8/02

CPC分类号： C03C1/006 ,  C03B19/12 ,  C03C3/06 ,  C03C2203/22 ,  C03C2203/24 ,  Y02P40/57

摘要： Sol-gel process for the production of large glass monoliths, whereby tetraalkoxysilane is added to a dispersion of pyrogenically produced silica and the ratio of SiO2:TEOS is 2,6 to 5,5:1.