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公开(公告)号:US5203897A
公开(公告)日:1993-04-20
申请号:US856454
申请日:1992-03-24
IPC分类号: C03B37/014
CPC分类号: C03B37/0142 , C03B37/01413 , C03B2201/31 , C03B2203/24 , C03B2203/26 , C03B2207/06 , C03B2207/12 , C03B2207/20 , C03B2207/36
摘要: An improved method for making preforms by vapor deposition soot laydown processes is provided wherein an oxidizing atmosphere is used during at least part of the laydown process, e.g., during the laydown of the center portion of the preform. The use of such an atmosphere has been found to result in enhanced dopant capture, reduced axial trends, and an overall stabilization of the laydown process. A method for selecting burner flows which optimize the laydown process is also provided.
摘要翻译: 提供了一种通过气相沉积烟灰沉积工艺制备预制件的改进方法,其中在至少部分沉积过程中使用氧化气氛,例如在预成型件的中心部分的放置期间。 已经发现使用这种气氛导致增强的掺杂剂捕获,降低的轴向趋势以及沉积过程的整体稳定性。 还提供了一种选择优化沉积过程的燃烧器流的方法。