Synthesis of Magnetic Particles and Silica Coated Core-Shell Materials

Abstract:

Ferrite particles were prepared by hydrothermal process at high temperature. The characterization of ferrite was examined by XRD, Mössbauer spectrum, and SEM. The XRD and Mössbauer spectrum confirmed that ferrite particles have a Fe₃O₄ inverse spinel structure, the SEM results show that each Fe₃O₄ particles were composed of many smaller magnetite nanoparticles. The as-synthesized Fe₃O₄ particles were modified by sodium citrate then further coated with SiO2 layer through the modified stöber method. The composited Fe₃O₄@SiO₂ microspheres exhibited outstanding monodispersity and magnetic property.

• Periodical: Advanced Materials Research (Volumes 631-632)
• Pages: 490-493
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.631-632.490
• Online since: January 2013
• Authors: Wen Bao Liu, Bing Jun Yang, Wan Li Yang, Wen Li, Jiao Yang, Mei Zhen Gao
• Keywords: Fe₃O₄@SiO₂, Mössbauer Spectrum, Saturation Magnetization, Stöber Method

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