Synthesis of magnetic carrier sub-microparticles with high stability through carbon reduction and solation coating methods

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• 作者：Qiang Zhang ; Li-Bo Gao ; Jun-Yang Li ; Ze-Bin Guo ; Zhen-Yin Hai ; Yan-Ting Xing…
• 关键词：Carbon reduction method ; Superparamagnetic ; Fe3O4–SiO2
• 刊名：Rare Metals
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：35
• 期：11
• 页码：870-873
• 全文大小：596 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Metallic Materials
  Chinese Library of Science
  
• 出版者：Journal Publishing Center of University of Science and Technology Beijing, in co-publication with Sp
• ISSN：1867-7185
• 卷排序：35

文摘

This paper presents a novel approach in synthesizing SiO₂–Fe₃O₄ magnetic carrier with high stability. The Fe₃O₄ magnetic powders were synthesized via one-step method named carbon reduction method. The advantages of the methods are of simple process, none lead-in pollution agent, low cost and adaptation to large-lot production. The stability of the magnetic powders is improved through modifying the Fe₃O₄ with SiO₂ in solation method. The results of the characterizations show that the superparamagnetic SiO₂–Fe₃O₄ sub-microparticles (~600 nm) with saturation intensity of 36.4 mA·m2·g−1 are obtained successfully. Moreover, the quantitating, repeatability and high stability of the carbon reduction method are demonstrated as well.