A study on the synthesis and characterisation of nanocrystalline transition metal oxynitrides

Yuhong Wang, Edward Lesterb, Duncan H. Gregory

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

A different processing route to bimetallic oxynitrides has been developed using oxide precursors generated from coprecipitation of ethanolic solutions of the relevant metal chlorides. The nitridation of the mixed-metal precursors yields nanocrystalline oxynitrides. Representative group 5-group 6 transition metal oxynitrides, M1-x M'x (O,N) (M = Nb, Ta; M' = Mo, W) have been prepared and characterised by powder X-ray diffraction (PXD), scanning electron microscopy with energy dispersive analysis by X-rays (SEM/EDAX), transmission electron microscopy (TEM) with selected area electron diffraction (SAED), BET surface area measurements and SQUID magnetometry. The mixed-metal oxynitrides form rock salt structures (a ∼4.3 Å) with disordered distributions of both cations and anions. The purity, particle size and surface area of materials are significantly dependent on nitridation temperature.

Original languageEnglish
Pages (from-to)6779-6786
Number of pages8
JournalJournal of Materials Science
Volume42
Issue number16
DOIs
Publication statusPublished - Aug 2007

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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