公开(公告)号：WO2004083138A1

公开(公告)日：2004-09-30

申请号：PCT/EP2004/002578

申请日：2004-03-12

Applicant: NOVARA TECHNOLOGY S.R.L. ,  BOARA, Giulio ,  PEDRETTI, Simone ,  RÜCKEMANN, Andreas ,  SPARPAGLIONE, Massimo

Inventor： BOARA, Giulio ,  PEDRETTI, Simone ,  RÜCKEMANN, Andreas ,  SPARPAGLIONE, Massimo

IPC: C03B19/12

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

Abstract: 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.

Abstract translation: 由氧化硅本身或与适当的添加剂构成的特殊成形制品通过室温成型制备，所述方法包括：从硅烷醇硅酸钠或至少一种至少一种硅氧烷的前体制备溶胶 的附加要素; 由此得到的溶胶水解; 加入胶体二氧化硅; 将所得混合物倒入所需的模具中; 溶胶凝胶和快速去除固体产品; 凝胶干燥; 凝胶致密化，通过在900℃至1500℃的温度范围内进行热处理。 这些物品可以用作光纤纺丝的预成型件。

公开(公告)号：WO2004063105A1

公开(公告)日：2004-07-29

申请号：PCT/EP2003/014759

申请日：2003-12-23

Applicant: NOVARA TECHNOLOGY S.R.L. ,  BOARA, Giulio ,  SPARPAGLIONE, Massimo ,  COSTA, Lorenzo

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

IPC: C03C1/00

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.

Abstract translation: 玻璃制品通过对主要包含硅醇盐的合适前体的溶液或悬浮液进行水解和缩聚，并通过在压力室中干燥获得的凝胶来制备，凝胶溶剂已被非质子溶剂代替，主要 丙酮，在氮气流下，在低于凝胶溶剂临界值的温度和压力条件下。 然后将干燥的凝胶通过热处理致密化。

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.