Preparation and magnetic characterization of Fe/metal oxide nanocomposite particles by means of hydrogen reduction assisted ultrasonic spray pyrolysis (USP-HR)

Ebin B., TOPARLI Ç., Gürmen S.

INTERNATIONAL JOURNAL OF MATERIALS RESEARCH, cilt.104, sa.5, ss.483-488, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 104 Sayı: 5
  • Basım Tarihi: 2013
  • Doi Numarası: 10.3139/146.110883
  • Dergi Adı: INTERNATIONAL JOURNAL OF MATERIALS RESEARCH
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.483-488
  • Anahtar Kelimeler: Metal/metal oxide composites, Nanocomposite particles, Ultrasonic spray pyrolysis, Magnetic properties, IRON NANOPARTICLES, COMPOSITES, FABRICATION
  • Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

Fe/metal oxide nanocomposite particles were produced by means of hydrogen reduction assisted ultrasonic spray pyrolysis. Fe/Fe0.761Mg0.2390O and Fe/MgO nanocomposite particles were obtained at 600 and 800 degrees C, respectively. The thermodynamics of the formation reactions were investigated. Increasing the reaction temperature allowed efficient reduction of the precursor to metallic iron that induces the formation of pure MgO phase. The crystallite sizes of the Fe in the composite structures slightly increased, and also the crystallite sizes of the oxides decreased with elevating temperature. The nanocomposite particles exhibited spherical morphology and their particle sizes were slightly different. All of the samples showed ferromagnetic characteristics and the results indicate that the amount of metal and metal oxide phases most affected the saturation magnetizations of the composite particles which were lower than pure iron.