Synthesis of ternary nitrides by mechanochemical alloying

C.J.H. Jacobsen, J.J. Zhu, H. Lindelov, Jianzhong Jiang

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Abstract

Ternary metal nitrides ( of general formula MxM'N-y(z)) attract considerable interest because of their special mechanical, electrical, magnetic, and catalytic properties. Usually they are prepared by ammonolysis of ternary oxides (MxM'O-y(m)) at elevated temperatures. We show that ternary transition metal nitrides are also obtained by nitridation of the corresponding ternary carbide at 823 K. This transformation appears to occur by solid-state diffusion of carbide and nitride ions. To establish more general synthesis schemes for ternary nitrides, we have focused on the preparation of ternary nitrides by mechanochemical alloying of a binary transition metal nitride (MxN) with an elemental transition metal. In this way, we have been able to prepare Fe3Mo3N and Co3Mo3N by ball-milling of Mo2N with Fe and Co, respectively. The transformation sequence from the starting materials ( the binary nitride and the transition metal) to the ternary nitride was followed by Mossbauer spectroscopy (for Fe3Mo3N) and by X-ray powder diffraction ( for both Fe3Mo3N and Co3Mo3N). Usually, the preparation of a given ternary nitride by ammonolysis of a ternary oxide is dependent on the availability of an oxide precursor with the desired stoichiometric ratio of the two metals. In the present mechanochemical approach, this is not a prerequisite. These synthesis routes are expected to be applicable to the synthesis of a wide range of ternary compounds.
Original languageEnglish
JournalJournal of materials chemistry
Volume12
Issue number10
Pages (from-to)3113-3116
ISSN0959-9428
Publication statusPublished - 2002

Cite this

Jacobsen, C. J. H., Zhu, J. J., Lindelov, H., & Jiang, J. (2002). Synthesis of ternary nitrides by mechanochemical alloying. Journal of materials chemistry, 12(10), 3113-3116.