Preparation and characterization of nanostructured ferrite materials by a nitrate-citrate self-combustion sol-gel synthesis

László Trif, Nikoletta Molnár-Vörös, Gyula Tolnai, István Sajó, Sándor Mészáros, Erika Kálmán

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

New chemical synthesis procedure for the preparation of nickel zinc doped W-type hexagonal barium ferrite and aluminium doped yttrium-iron garnet nanoparticles has been developed, using the nitrate-citrate sol-gel auto-combustion method (NCSAM). The crystalline phase attributes, microstructure, morphology, specific surface area, Curie temperature (Tc), permeability, thermal behavior of the as-burnt phase and the heat treated powders were characterized using XRD, SEM, FT-IR, BET, TG-DTA and AC magnetic permeability with frequency shift. In the case of the hexaferrite, the pure W-type ferrite phase is formed during 4 hour annealing at a temperature of 1200 °C, the garnet phase is formed at a lower temperature i.e. 1000 °C Furthermore it has been confirmed, that the AC magnetic permeabilities of the garnet materials are strongly depending on the chemical composition.

Original languageEnglish
Pages (from-to)167-172
Number of pages6
JournalMaterials Science Forum
Volume589
DOIs
Publication statusPublished - Dec 1 2008
Event6th Hungarian Conference on Materials Science - Siofok, Hungary
Duration: Oct 14 2007Oct 16 2007

Keywords

  • Ceramics
  • Garnet
  • Hexaferrite
  • Nanoparticles
  • Sol-gel and self-combustion

ASJC Scopus subject areas

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

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