Mechanochemical syntheses of perovskite KMIIF3 with cubic structure (MII = Mg, Ca, Mn, Fe, Co, Ni, and Zn)

Jaeryeong Lee, Heeyoung Shin, Jaechun Lee, Hunsaeng Chung, Qiwu Zhang, Fumio Saito

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

An equi-molar mixture of potassium fluoride (KF) and one of alkaline-earth or transition metal fluoride MIIF2 (MII= Mg, Ca, Mn, Fe, Co, Ni, and Zn) was ground in air by using a planetary ball mill to investigate mechanochemical (MC) synthesis of fluoroperovskites KMIIF3. Rietveld refinement for the ground mixtures was conducted on the basis of XRD data to inquire into structural properties of the KMIIF3 synthesized mechanochemically. The synthesis reactions proceed with grinding time, and ultimately a single phase of cubic structural KMIIF3 (Pm3m, Z = 1) was obtained after grinding for 21.6 ks. The values of unit cell parameter, a, of KMIIF3 synthesized by MC reaction, are slightly larger than those by solid-state reaction at high temperature, and this may be attributed to structural distortions caused by intensive grinding.

Original languageEnglish
Pages (from-to)1457-1460
Number of pages4
JournalMaterials Transactions
Volume44
Issue number7
DOIs
Publication statusPublished - 2003 Jul

Keywords

  • Fluoroperovskite (KMFe)
  • Mechanochemical synthesis
  • Rietveld refinement
  • Structural distortion

ASJC Scopus subject areas

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

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