Microstructure characterization and cation distribution of nanocrystalline magnesium ferrite prepared by ball milling

S. K. Pradhan, S. Bid, M. Gateshki, V. Petkov

Research output: Contribution to journalArticlepeer-review

177 Scopus citations

Abstract

Nanocrystalline magnesium ferrite is synthesized by high-energy ball milling. The formation of nanocrystalline ferrite phase is observed after 3 h of milling and its content increases with milling time. The structural and microstructural evolution of the nanophase have been studied by X-ray powder diffraction and the Rietveld method. After 3 h of milling, ferrite phase (mixed spinel) nucleates from the starting α-Fe2O3-MgO solid solution. After 5 h of milling, a second ferrite phase (inverse spinel) with a larger lattice parameter emerges and its content grows in parallel with that of the mixed spinel matrix. After 11 h of milling, only a very small amount (∼3 wt.%) of the starting α-Fe2O3 remains unused. With increasing milling time the type of the cationic distribution over the tetrahedral and octahedral sites in the lattice of the nanocrystalline material changes from a mixed to inverse type. Microstructure characterization by HRTEM corroborates the findings of X-ray analysis.

Original languageEnglish
Pages (from-to)224-230
Number of pages7
JournalMaterials Chemistry and Physics
Volume93
Issue number1
DOIs
StatePublished - Sep 15 2005

Keywords

  • Ball milling
  • Cation distribution
  • Microstructure
  • Nanocrystalline Mg-ferrite
  • Rietveld method

Fingerprint

Dive into the research topics of 'Microstructure characterization and cation distribution of nanocrystalline magnesium ferrite prepared by ball milling'. Together they form a unique fingerprint.

Cite this