Structural investigation of iron sulfides synthesized by mechanochemical reaction

C. K. Lin, C. L. Du, G. S. Chen, R. F. Louh, P. Y. Lee, H. M. Lin

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In the current study, pure elemental powders of Fe and S were mixed to give the desired compositions of Fe67S33, Fe50S50 and Fe33S67. A SPEX 8000D high-energy ball mill was used to synthesize iron sulfide powders under an Ar-filled atmosphere. The as-milled powders were examined by conventional X-ray diffraction (XRD) and synchrotron X-ray absorption spectroscopy (XAS). The experimental results showed that mechanochemical reactions occurred during the ball milling process for all the compositions investigated. The Fe1-xS phase was observed at the end of milling. The formation time of the Fe1-xS phase increased with increasing sulfur content. Extended X-ray absorption fine structure (EXAFS) results revealed that the nearest neighbor bond lengths of the radial distribution function for iron decreased when iron sulfides formed. X-ray absorption near-edge structure (XANES) of sulfar K-edge distinguished better the structural evolution of these iron sulfides.

Original languageEnglish
Pages (from-to)834-838
Number of pages5
JournalMaterials Science and Engineering A
Volume375-377
Issue number1-2 SPEC. ISS.
DOIs
Publication statusPublished - Jul 2004
Externally publishedYes

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Keywords

  • EXAFS
  • Iron sulfides
  • Mechanical alloying
  • Mechanochemical reaction
  • XANES

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

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