Preparation of Aluminum Oxynitride and Nitride Spherical Powders Via Flame Synthesis Assisted by DC Arc Plasma | Zendy

Takao Yasumasa | Zendy; Shuzenji Kiyotaka | Zendy; Tachibana Takeshi | Zendy

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Preparation of Aluminum Oxynitride and Nitride Spherical Powders Via Flame Synthesis Assisted by DC Arc Plasma

Author(s) -

Takao Yasumasa,

Shuzenji Kiyotaka,

Tachibana Takeshi

Publication year - 2008

Publication title -

journal of the american ceramic society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.9

H-Index - 196

eISSN - 1551-2916

pISSN - 0002-7820

DOI - 10.1111/j.1551-2916.2007.02043.x

Subject(s) - nitride , materials science , plasma , ceramic , chemical engineering , oxygen , aluminium , particle (ecology) , nanotechnology , metallurgy , chemistry , organic chemistry , oceanography , geology , physics , layer (electronics) , quantum mechanics , engineering

Spherical powders of aluminum oxynitride/nitride are directly prepared by flame synthesis in which oxygen serves as an indispensable reactant. Nonoxide powders are commonly nonspherical, and the particle sizes of these powders are less than submicrometers. The major limiting factors for the synthesis are the free energy, reaction temperature, and reaction rate. The innovative issue related to this flame technology that is assisted by plasma is the ambivalence of the reducing gas atmosphere over 1500 K. The chemical equilibrium calculated indicates that the plasma heating compensates for the lack of reaction temperature under a low‐oxygen condition. This burner realizes a high‐speed reaction with the help of the reactive species in the arcs.

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