- 专利标题: RARE EARTH METAL-DOPED QUARTZ GLASS AND METHOD FOR PRODUCING THE SAME
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申请号: US15634634申请日: 2017-06-27
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公开(公告)号: US20170369359A1公开(公告)日: 2017-12-28
- 发明人: Hardy BAIERL , Stephan GRIMM , Kay SCHUSTER , Jan DELLITH , Andreas LANGNER , Gerhard SCHOETZ , Walter LEHMANN , Thomas KAYSER
- 申请人: Heraeus Quarzglas GmbH & Co. KG
- 优先权: EP16176590.4 20160628
- 主分类号: C03C3/06
- IPC分类号: C03C3/06 ; C03B20/00 ; C03B19/06
摘要:
A method for producing rare earth metal-doped quartz glass includes the steps of (a) providing a blank of the rare earth metal-doped quartz glass, and (b) homogenizing the blank by softening the blank zone by zone in a heating zone and by twisting the softened zone along a rotation axis. Some rare earth metals, however, show a discoloration of the quartz glass, which hints at an unforeseeable and undesired change in the chemical composition or possibly at an inhomogeneous distribution of the dopants. To avoid this drawback and to provide a modified method which ensures the production of rare earth metal-doped quartz glass with reproducible properties, during homogenization according to method step (b), the blank is softened under the action of an oxidizingly acting or a neutral plasma.