Iron-promoted synthesis of tantalum and niobium oxynitrides

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1006/jssc.1996.0383· OSTI ID:508633

Houmes, J D; Loye, H.C. zur ^[1]

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1. Massachusetts Institute of Technology, Cambridge, MA (United States)

Nb{sub 5}N{sub 6-{delta}}O{sub y} and Ta{sub 5}N{sub 6-{delta}}O{sub y} have been synthesized by reacting iron-containing precursors (FeMO{sub 4}, FeM{sub 2}O{sub 6}, Fe{sub 2}O{sub 3}/M{sub 2}O{sub 5}, or FeM, M - Ta, Nb) with flowing ammonia at 700 and 900{degrees}C for the niobium- and tantalum-containing precursors, respectively. It is observed that the oxynitride materials may be synthesized at these temperatures only by using precursors that contain iron. The structures of these materials, which were determined by Rietveld refinement of powder X-ray diffraction data, show marked similarity to the structures of several ternary nitrides synthesized by similar methods. The role of iron in the formation of these materials is discussed.

• OSTI ID: 508633
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 2 Vol. 127; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHEMICAL PREPARATION
CRYSTAL STRUCTURE
NIOBIUM COMPOUNDS
NITRIDES
OXIDES
TANTALUM COMPOUNDS
X-RAY DIFFRACTION