公开(公告)号：EP0905093B1

公开(公告)日：2002-11-06

申请号：EP98307231.5

申请日：1998-09-08

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Fleming, Debra Anne ,  Johnson, David Wilfred Jr. ,  Hubbauer, Philip ,  MacChesney, John Burnette ,  Stockert, Thomas Edward ,  Walz, Frederick W. Jr.

IPC: C03B19/12 ,  C04B35/14 ,  C04B35/624

CPC classification number: C04B35/14 ,  C03B19/12 ,  C04B35/624

公开(公告)号：EP1074516A1

公开(公告)日：2001-02-07

申请号：EP00306267.6

申请日：2000-07-24

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Alonzo, John C. ,  Bhandarkar, Suhas Dattatreya ,  Bohrer, Michael Philip ,  Johnson, David Wilfred Jr.

IPC: C03B8/02 ,  C03B19/12

CPC classification number: C01B33/1417 ,  C03C1/006

Abstract: Silica sols exhibiting desirable yield-dilatancy are fabricated. A mixture comprising silica, water, and a pH-adjusting agent is provided, and the mixture is shear-mixed. The desirable properties of the resultant sol are attained by using a concentration of pH-adjusting agent that provides a viscosity within a particular range during shear mixing. The requisite pH range, however, changes depending on the properties of the silica mixture. A discovered technique for determining this changing pH range is by selecting the pH based on the silica surface area per unit volume of the mixture.

Abstract translation: 制造显示出期望的屈服 - 膨胀的二氧化硅溶胶。 提供包含二氧化硅，水和pH调节剂的混合物，并将混合物剪切混合。 通过使用在剪切混合期间提供特定范围内的粘度的pH调节剂的浓度来获得所得溶胶的所需性质。 然而，所需的pH范围根据二氧化硅混合物的性质而变化。 用于确定该变化的pH范围的发现技术是通过基于混合物的每单位体积的二氧化硅表面积选择pH。

公开(公告)号：EP0905093A1

公开(公告)日：1999-03-31

申请号：EP98307231.5

申请日：1998-09-08

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Fleming, Debra Anne ,  Johnson, David Wilfred Jr. ,  Hubbauer, Philip ,  MacChesney, John Burnette ,  Stockert, Thomas Edward ,  Walz, Frederick W. Jr.

IPC: C03B19/12 ,  C04B35/14 ,  C04B35/624

CPC classification number: C04B35/14 ,  C03B19/12 ,  C04B35/624

Abstract: The invention is a sol-gel extrusion process which allows fabrication of both thick and thin wall tubes. For example, the process is capable of preparing silica overcladding tubes in a manner easier than sol-gel casting processes, and also capable of preparing relatively thin substrate tubes, which are difficult to cast. According to the invention, a silica dispersion containing a stabilizing agent is provided, a gelling agent is added to the dispersion to induce gellation, and the resultant gel is extruded into a silica body, in the substantial absence, i.e. less than 0.5%wt., of polymeric material from the gel. Substantially avoiding the inclusion of such polymeric material in overcladding and substrate tubes offers significant commercial advantages by reducing the time and energy required to remove organic materials from the tube bodies, by reducing environmental impact and by reducing the amount of impurities introduced in the tubes.

Abstract translation: 本发明是一种溶胶 - 凝胶挤出方法，其允许制造厚壁和薄壁管。 例如，该方法能够以比溶胶 - 凝胶浇铸方法更容易的方式制备二氧化硅外包管，并且还能够制备难以铸造的相对薄的基材管。 根据本发明，提供了含有稳定剂的二氧化硅分散体，向分散体中加入胶凝剂以引发凝胶化，并将所得凝胶挤出成二氧化硅体，基本上不存在，即小于0.5重量％。 ，来自凝胶的聚合物材料。 通过减少从管体中除去有机材料所需的时间和能量，通过减少环境影响和减少引入管中的杂质量，基本上避免了这种聚合物材料在外包装和底物管中的包含。