Synthesis and Properties of Magnetically Operated Nanocomposites Based on Transition Metals Oxides

• Main Authors: Lyudmyla STOROZHUK, Sergey HUTORNOY, Ivan MUDRAK
• Format: Article
• Language: English
• Published: Kaunas University of Technology 2013-03-01
• Series: Medžiagotyra
• Subjects: surface modification; transition metals oxides; magnetically operated nanocomposites; Co ferrite; Ni ferrite; magnetic materials; biologically compatible coating
• Online Access: http://matsc.ktu.lt/index.php/MatSc/article/view/3818

<p>Technique for synthesis magnetically operated nanocomposites based on transition metals oxides (MeFe₂O₄, Me = Fe²⁺, Ni²⁺, Co²⁺) with biologically compatible coating (SiO₂)_x were developed and optimized. Tetraethoxysilane (TEOS) and sodium silicate were used as precursors for formation of SiO₂ onto surface of magnetic component. Content of SiO₂ in nanocomposite surface layer were adjusted from 0.1 g to 1.0 g for 1.0 g of magnetic component.</p> Structure of the obtained nanocomposites was studied using XRD method, electron microscopy and IR-Fourier spectroscopy. Influence of adsorbents composition on their magnetic properties was studied using vibration magnetometer. It was shown that values of specific magnetization at saturation for nanocomposites containing 0.2 g of non-magnetic component per 1 g of magnetic component corresponds to the typical values of pure magnetic phase. With increasing of content of non-magnetic components a decrease of specific magnetization at saturation was revealed.<p>DOI: <a href="http://dx.doi.org/10.5755/j01.ms.19.1.3818">http://dx.doi.org/10.5755/j01.ms.19.1.3818</a></p>