Ring plasma jet method and apparatus for making an optical...

C - Chemistry – Metallurgy – 03 – B

Patent

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C03B 37/018 (2006.01) C23C 4/16 (2006.01) C23C 16/453 (2006.01) C23C 16/513 (2006.01) C23C 16/54 (2006.01)

Patent

CA 2534525

A plasma flame is generated in an interior volume of a tubular member to be a radially directed plasma flame, directed to an inside surface of the tubular member, and reagent chemicals are injected to form soot particles, and the soot particles are deposited on the inner surface by the plasma flame. The plasma flame is generated by establishing an electromagnetic field in a region in the tube interior and inserting a plasma gas feeder nozzle into the tube interior, with the nozzle structure to emit plasma gas in a manner forming the radially directed plasma flame.

Selon l'invention, une flamme de plasma est générée dans un volume intérieur d'un élément tubulaire et dirigée radialement vers une surface intérieure de l'élément tubulaire; et des substances chimiques réactives sont injectées en vue de former des particules de suie, lesquelles particules de suie sont déposées sur la surface intérieure par la flamme de plasma. La flamme de plasma est générée par création d'un champ électromagnétique dans une zone interne du tube, et par introduction d'une buse d'alimentation en gaz plasma à l'intérieur du tube, la buse étant configurée pour émettre le gaz plasma de façon à former la flamme de plasma dirigée radialement.

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