The influence of synthesis parameters on the structure and acb response of Mn0.75 Zn0.25FeyO4 ferrite
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2016
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INTERNATIONAL MATERIALS RESEARCH CONGRESS, 25th
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The interest to use magnetic nanoparticles in biomedicine has increased due to their inducible
magnetic properties[1-4]. In the treatment of certain diseases as cancer, it has been used to
constitute drug carrier systems[2,3] as well as hyperthermia agents[3,4]. These materials can also be
used as a tracer in the diagnosis by Magnetic Resonance Imaging (MRI)[3,4] and Alternating Current
Biosuceptometry (ACB)5, which are techniques that do not use ionizing radiation. Neverthless, the
sensitivity of these techniques depend on the magnetic susceptibility of tracers. In this work, the
ferrite nanoparticles with the composition of Mn0.75Zn0.25FeyO4 (ferrite), where 1.5 ? y ? 2.8, were
synthesized by the co-precipitation method and the influence of iron content, reaction time and
concentration of precipitating agent on the structure and ACB response was analyzed. It was noted
that the synthesis using alkaline metal hydroxide between 0.1 and 0.2 mol/L provides single-phase
materials with spinel structure [ICSD 28515 (PDF - 742 402), space group Fd3m]. The higher
concentration (0.2 mol/L) leads to materials with higher crystallinity and adequate performance for the
ACB technique. The longer the reaction time the greater is the magnetic susceptibility for compositions
wherein the iron is in excess (y>2.0). Also, the susceptibility is higher for ferrites with excess of iron.
Como referenciar
NAVARRO, RAPHAELLA; MOURA, TIAGO F.A.; YOSHITO, WALTER K.; ICHIKAWA, RODRIGO; MARTINEZ, LUIZ G.; MATOS, RONALDO V.R.; MIRANDA, JOSE R. de A.; SAEKI, MARGARIDA J. The influence of synthesis parameters on the structure and acb response of Mn0.75 Zn0.25FeyO4 ferrite. In: INTERNATIONAL MATERIALS RESEARCH CONGRESS, 25th, August 14-19, 2016, Cancún, Mexico. Abstract... Disponível em: http://repositorio.ipen.br/handle/123456789/27611. Acesso em: 27 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.