Nitriding process of refractory oxides

C - Chemistry – Metallurgy – 01 – B

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C01B 21/072 (2006.01)

Patent

CA 1293849

BREVET D'INVENTION PROCEDE DE NITRURATION D'OXYDES REFRACTAIRES ABREGE DESCRIPTIF La présente invention concerne un procédé de nitrura- tion d'oxydes réfractaires caractérisé en ce qu'il consiste à faire réagir de l'ammoniac sur ledit oxyde réfractaire en poudre, dans un four où l'oxyde réfractaire pulvérulent est porté à une température d'au moins 1200°C et dans lequel le flux d'ammoniac pénètre à une température inférieure à environ 500°C.

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