公开(公告)号：EP1320515A1

公开(公告)日：2003-06-25

申请号：EP01943533.8

申请日：2001-06-21

Applicant: Novara Technology S.R.L.

Inventor： COSTA, Lorenzo ,  SPARPAGLIONE, Massimo

IPC: C03C1/00 ,  C01B33/158 ,  C01B33/16

CPC classification number: C01B33/16 ,  C01B33/1585 ,  C03B19/12 ,  C03C1/006 ,  Y02P20/544

Abstract: It is described a sol-gel process that allows to obtain dry gels, and possibly the corresponding dense glassy bodies, having higher dimensions compared to similar known processes.

公开(公告)号：EP1667938A1

公开(公告)日：2006-06-14

申请号：EP04765097.3

申请日：2004-09-11

Applicant: Novara Technology S.R.L.

Inventor： COSTA, Fulvio ,  GINI, Lucia ,  RÜCKEMANN, Andreas ,  COSTA, Lorenzo

IPC: C03C1/00 ,  C03B19/12 ,  C03C3/06 ,  G21F9/30

CPC classification number: C03C1/002 ,  C03B19/12 ,  C03C1/006 ,  C03C3/06 ,  C03C14/008 ,  C03C2203/26 ,  C03C2203/27 ,  C03C2203/34 ,  C03C2203/52 ,  C03C2214/14 ,  C03C2214/32 ,  G21F9/12 ,  G21F9/14 ,  G21F9/30 ,  G21F9/305

Abstract: Sol-gel-process to prepare aerogels comprising the preparation of a solution of a compound having the formula Xm-M-(OR)n-m, the hydrolysis of the compound to give a sol, gelation, drying, densifying and sintering. This method can be used to treat radioactive residues constituted by aqueous solutions of radioactive substances.

公开(公告)号：EP1113987B1

公开(公告)日：2004-07-21

申请号：EP99946432.4

申请日：1999-09-06

Applicant: Novara Technology S.R.L.

Inventor： COSTA, Lorenzo ,  COSTA, Pier, Paolo ,  GRANDI, Stefania

IPC: C01B33/12 ,  C23C18/12

CPC classification number: C03C1/008 ,  C23C18/1212 ,  C23C18/1254 ,  C23C18/1279 ,  Y10T428/2495

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：EP1175377A1

公开(公告)日：2002-01-30

申请号：EP00911254.1

申请日：2000-03-08

Applicant: Novara Technology S.R.L.

Inventor： COSTA, Fulvio ,  COSTA, Pierpaolo ,  COSTA, Lorenzo

IPC: C03B37/016 ,  C03B19/12

CPC classification number: C03B19/12 ,  C03B37/016

Abstract: A sol-gel process is described that allows dry gels to be produced, and where necessary, the corresponding dense vitreous bodies, around an incompressible insert. A particular feature of the process is the step of rotating a container holding the sol and incompressible insert throughout the gelling step under such conditions that a wet gel adhering to the insert is produced, which is then dried. The process is useful particularly for the production of preforms for optical fibers, which are also claimed.

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

公开(公告)号：EP1583721A1

公开(公告)日：2005-10-12

申请号：EP03785922.0

申请日：2003-12-23

Applicant: Novara Technology S.R.L.

Inventor： BOARA, Giulio ,  SPARPAGLIONE, Massimo ,  COSTA, Lorenzo

IPC: C03C1/00 ,  C03B19/12 ,  C03C3/06

CPC classification number: C03C3/06 ,  C03B19/12 ,  C03C1/006 ,  C03C2203/26 ,  C03C2203/27 ,  C03C2203/34 ,  C03C2203/52

Abstract: Glassy articles are prepared by subjecting to hydrolysis and policondensation a solution or suspension of a suitable precursor, mainly comprising a silicon alkoxide, and by drying the obtained gel in a pressure chamber, the gel solvent having been substituted by a non-protic solvent, mainly acetone, under nitrogen flowing, at temperature and pressure conditions lower than the gel solvent critical values. The dried gel is then densified by a thermal treatment.

公开(公告)号：EP1521724A1

公开(公告)日：2005-04-13

申请号：EP03763735.2

申请日：2003-07-07

Applicant: Novara Technology S.R.L.

Inventor： COSTA, Fulvio ,  COSTA, Lorenzo

IPC: C03C1/00 ,  C03B8/02

CPC classification number: C03C1/008 ,  C23C18/1216 ,  C23C18/1254

Abstract: Process for the preparation and the deposition of vitreous films on substrates comprising: the dissolution of one or more metal alkoxides in aprotic solvent, the hydrolysis of the resulting solution, yhe eventual removalof the formed alcohol, the deposition of the resulting sol on the substrate surface of interest and the final drying of the film.

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.

公开(公告)号：EP1113987A1

公开(公告)日：2001-07-11

申请号：EP99946432.4

申请日：1999-09-06

Applicant: Novara Technology S.R.L.

Inventor： COSTA, Lorenzo ,  COSTA, Pier, Paolo ,  GRANDI, Stefania

IPC: C01B33/12 ,  C23C18/12

CPC classification number: C03C1/008 ,  C23C18/1212 ,  C23C18/1254 ,  C23C18/1279 ,  Y10T428/2495

Abstract: It is described a sol-gel process allowing the preparation, on a substrate, of glassy films of silicon oxide or mixed oxides based on silicon oxide, of thickness above 1 micrometer, generally between 2 and 20 micrometers, and characterised by absence of defects, that turn out to be particularly suitable as waveguides in flat optical devices.