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›› 2008, Vol. 8 ›› Issue (1): 177-181.

• 材料工程专栏 • 上一篇    下一篇

含锰铁氧化物磁性中空微球的制备与性能表征

张晓俊,陈建定,宣绍峰,马新胜,黄广建   

  1. 华东理工大学材料科学与工程学院
  • 出版日期:2008-02-20 发布日期:2008-02-20

Synthesis and Characterization of Hollow Mn-Fe Oxide Magnetic Microspheres

ZHANG Xiao-jun,CHEN Jian-ding,XUAN Shao-feng,MA Xin-sheng,HUANG Guang-jian   

  1. Material Science and Engineering, East China University of Science and Technology
  • Online:2008-02-20 Published:2008-02-20

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被引次数

3

摘要： 用沉积表面反应法制备了以聚苯乙烯为核、Mn-Fe氧化物为壳的磁性核-壳微球. 考察了锰含量对核-壳球磁性的影响，分别采用烧结法和溶剂萃取法去除核-壳球内的聚苯乙烯以制取中空微球. 讨论了烧结温度与所形成的中空微球比表面积的关系，考察了溶剂萃取法去除聚苯乙烯的效果，比较了两者所形成的中空微球的性能. 结果表明，烧结法所得微球性能优于溶剂萃取法所得微球. 探讨了烧结法形成中空磁性球的最佳条件，在400℃下煅烧核-壳微球可以得到饱和磁化强度为68.66 emu/g、比表面积为27.8438 m2/g的含锰铁氧化物磁性中空微球.

关键词: 锰铁氧化物, 磁性能, 核-壳微球, 中空微球

Abstract: The magnetic microspheres with polystyrene (PS) spheres as cores and Mn-Fe oxide as shells were synthesized by deposition and surface reaction. The effect of different ratios of manganese salt on magnetic product was studied. To obtain the hollow magnetic microspheres, the PS core in spheres was removed by calcination and extraction in solvent, respectively. The relation of calcination temperature to the spheres specific surface area was investigated. The removal efficiency of PS via extraction was also examined. In comparison of the calcination and extraction in solvent, it is shown that the hollow Mn-Fe oxide microspheres obtained from the former way are better than those from the latter one. The optimal conditions to form hollow Mn-Fe oxide microspheres by calcination were explored, the results show that the saturation magnetization and specific surface area of the hollow Mn-Fe oxide microspheres were measured as 68.66 emu/g and 27.8438 m2/g respectively when calcinated at 400℃.

Key words: Mn-Fe oxide, magnetism, core-shell microspheres, hollow microspheres