METHOD FOR PRODUCING SiO2 GRANULATE
    2.
    发明申请
    METHOD FOR PRODUCING SiO2 GRANULATE 有权
    生产SiO2颗粒的方法

    公开(公告)号:US20150086462A1

    公开(公告)日:2015-03-26

    申请号:US14397484

    申请日:2013-04-25

    IPC分类号: C01B33/18

    摘要: The invention relates to a process for producing SiO2 granules by freezing and re-thawing an SiO2 suspension, wherein a separation of liquid and sediment composed of agglomerated SiO2 particles occurs in the course of thawing, the liquid removed is decanted and the residual moisture in the sediment is removed by a drying step with formation of the SiO2 granules. According to the invention, an auxiliary comprising alkali metal-free bases in the form of nitrogen hydrides is added to the suspension to set the pH greater than 7.

    摘要翻译: 本发明涉及一种通过冷冻和再融化SiO 2悬浮液来生产SiO 2颗粒的方法,其中在解冻过程中发生由附聚的SiO 2颗粒组成的液体和沉积物的分离,将去除的液体倾倒并将残留的水分 通过形成SiO 2颗粒的干燥步骤除去沉淀物。 根据本发明,向悬浮液中加入包含氮化氢形式的不含碱金属的碱的辅助剂,使pH大于7。

    Method for producing an optical preform with a POD cladding glass layer
    4.
    发明授权
    Method for producing an optical preform with a POD cladding glass layer 有权
    用于制造具有POD包层玻璃层的光学预型件的方法

    公开(公告)号:US09296639B2

    公开(公告)日:2016-03-29

    申请号:US14420572

    申请日:2013-08-08

    IPC分类号: C03B37/012

    摘要: The invention relates to a plasma deposition process for producing an optical preform, which is characterized by a cladding glass layer having a non-round internal cross-section together with high fluorine doping and axially and radially specified dopant distribution, which in the simplest case is as uniform as possible. For this purpose, a two-stage method is proposed, wherein a substrate body having a non-round cross-section is first reshaped into a coated substrate body having a circular cross-section in that a POD filling layer made of quartz glass having the nominal fluorine concentration is deposited onto a present filling surface and rounded by grinding, and then in the second stage of the method a POD sheathing glass layer made of fluorine-doped quartz glass and having a circular-ring-shaped cross-section is deposited.

    摘要翻译: 本发明涉及一种用于制造光学预型件的等离子体沉积工艺,其特征在于具有非圆形内部横截面的包层玻璃层以及高氟掺杂以及轴向和径向指定的掺杂剂分布,其最简单的情况是 尽可能统一。 为此,提出了一种两级方法,其中具有非圆形横截面的基底主体首先重新成形为具有圆形横截面的涂覆基底主体,其中由具有圆形横截面的石英玻璃制成的POD填充层具有 将标称氟浓度沉积在当前的填充表面上并通过研磨进行圆化,然后在该方法的第二阶段中沉积由氟掺杂的石英玻璃制成并具有圆环形横截面的POD护套玻璃层。

    Method for producing a component of rare earth metal-doped quartz glass

    公开(公告)号:US10851008B2

    公开(公告)日:2020-12-01

    申请号:US15938156

    申请日:2018-03-28

    IPC分类号: C03B19/06 C03B19/14

    摘要: A method for producing a component with portions of a rare earth metal-doped quartz glass, an intermediate product containing voids and consisting of a SiO2 raw material doped with rare earth metal is introduced into a sinter mold the interior of which is bordered by a carbonaceous mold wall, and is melted therein into the component by gas pressure sintering at a maximum temperature above 1500° C. A shield is arranged between the mold wall and the intermediate product. In order to indicate a modified gas pressure sintering method that ensures the production of rare earth metal-doped quartz glass with reproducible properties, a bulk material of amorphous SiO2 particles with a layer thickness of at least 2 mm is used as the shield, the softening temperature thereof being at least 20° C. higher than the softening temperature of the doped SiO2 raw material, and the bulk material being gas-permeable at the beginning of the melting of the intermediate product, and the bulk material sintering during melting into an outer layer that is gas-tight to a pressure gas.

    METHOD FOR PRODUCING A COMPONENT OF RARE EARTH METAL-DOPED QUARTZ GLASS

    公开(公告)号:US20180282196A1

    公开(公告)日:2018-10-04

    申请号:US15938156

    申请日:2018-03-28

    IPC分类号: C03B19/06 C03B19/14

    摘要: A method for producing a component with portions of a rare earth metal-doped quartz glass, an intermediate product containing voids and consisting of a SiO2 raw material doped with rare earth metal is introduced into a sinter mold the interior of which is bordered by a carbonaceous mold wall, and is melted therein into the component by gas pressure sintering at a maximum temperature above 1500° C. A shield is arranged between the mold wall and the intermediate product. In order to indicate a modified gas pressure sintering method that ensures the production of rare earth metal-doped quartz glass with reproducible properties, a bulk material of amorphous SiO2 particles with a layer thickness of at least 2 mm is used as the shield, the softening temperature thereof being at least 20° C. higher than the softening temperature of the doped SiO2 raw material, and the bulk material being gas-permeable at the beginning of the melting of the intermediate product, and the bulk material sintering during melting into an outer layer that is gas-tight to a pressure gas.