Method and device for producing a controlled atmosphere with...

Details Method and device for producing a controlled atmosphere with... Method and device for producing a controlled atmosphere with...

G - Physics

05

D

G05D 21/02 (2006.01) F27B 17/02 (2006.01) F27D 7/06 (2006.01) G01N 25/00 (2006.01)

Patent

CA 2289616

The present invention concerns a method for producing a controlled atmosphere having an oxygen partial pressure of below 10 -13 Pa and an operating temperature above 1000°C. According to the invention a furnace is vented by a gas mixture having an oxygen partial pressure lower than 10 -8 Pa but higher than that of said controlled atmosphere, and that a partial volume of said furnace is submitted to a static electric field having a strength of at least 6V/cm and reducing the oxygen partial pressure in this partial volume by orders of magnitude. The invention also relates to a device for implementing this method.

L'invention concerne un procédé pour produire une atmosphère contrôlée présentant une pression partielle d'oxygène inférieure à 10<-13> Pa et une température de service supérieure à 1000 DEG C. On injecte dans un générateur d'air chaud un mélange gazeux dont la pression partielle d'oxygène est inférieure à 10<-8> Pa mais supérieure à celle de l'atmosphère contrôlée, de manière à exposer un volume partiel du générateur d'air chaud à un champ d'électricité statique d'une puissance d'au moins 6 V/cm, et à diminuer de plusieurs ordres de grandeur la pression partielle d'oxygène dans ce volume partiel. Cette invention concerne également un dispositif pour appliquer ce procédé.

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