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：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。