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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

Mn0.8Zn0.2Fe2O4/MgAl-LDHs复合材料的磁性能和磁热效应

张小川1, 王德平1, 2, 姚爱华1, 黄文hai1, 2   

  1. 同济大学 1. 生物与信息材料研究所, 材料科学与工程学院; 2. 先进土木工程材料教育部重点实验室, 上海 200092
  • 收稿日期:2007-07-26 修回日期:2007-09-28 出版日期:2008-07-20 网络出版日期:2008-07-20

Magnetic Properties and Thermomagnetic Effect in Mn0.8Zn0.2Fe2O4/MgAl-LDHs Composite

ZHANG Xiao-Chuan1, WANG De-Ping1, 2, YAO Ai-Hua1, HUANG Wen-Hai1, 2   

  1. 1. Institute of BioEngineering and Information Technology Materials, School of Materials Science and Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Advanced Civil Engineering Materials of the Ministry of Education, Tongji University, Shanghai 200092, China
  • Received:2007-07-26 Revised:2007-09-28 Published:2008-07-20 Online:2008-07-20

PDF (PC)

1965

被引次数

4

摘要： 采用共沉淀法将纳米锰锌铁氧体粒子(Mn0.8Zn0.2Fe2O4)与镁铝双金属氢氧化物(MgAl-LDHs)进行组装合成了磁性纳米镁铝双金属氢氧化物, 并通过TEM、FTIR、DTA、XRD、VSM等方法对其进行表征. 样品的结构分析结果表明, 复合材料具有典型的核壳结构, 镁铝双金属氢氧化物被赋予磁性后并没有改变其层状结构的典型特征. 样品的磁学性能和磁热性能测试结果表明, 铁氧体的含量对复合材料的磁性能和磁热效应起着决定性作用; MgAl-LDHs对铁氧体粒子没有显著的磁屏蔽效应, 复合材料的饱和磁化强度与铁氧体的含量呈正线性相关, 而复合材料的矫顽力随MgAl-LDHs含量的增加呈现先减小后增大的趋势, 但整体变化幅度很小, 同时MgAl-LDHs对铁氧体粒子磁热效应的影响也极小.


关键词: 锰锌铁氧体, 镁铝双金属氢氧化物, 磁性能, 磁热效应

Abstract: A magnetic layered inorganic-inorganic composite involving manganese zinc ferrite (Mn0.8Zn0.2Fe2O4) and Mg-Al layered double hydroxides (MgAl-LDHs) was assembled by coprecipitation method. The products were characterized by TEM, FTIR, DTA, XRD and VSM. The results indicate that the composite has core-shell structure, the introduction of ferrite particles does not change the typical layered-structure of MgAl-LDHs phase. MgAl-LDHs has infinitely small magnetic shielding effect on ferrite particles, the saturation magnetization values of the composite increase linearly with the ferrite content, however, is the MgAl-LDHs content increasing, the ceorcivity values of the composite decrease first, then increase subsequently, but these changes are small on the whole. In addition, the LDHs layer also has infinitely small effect on the thermomagnetic effect of ferrite particles. It is obvious that the ferrite content in the composite plays a decisive role on magnetic properties and thermomagnetic effect.


Key words: MnZn ferrite, Mg-Al layered double hydroxides, magnetic properties, thermomagnetic effect

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