物理化学学报 >> 1995, Vol. 11 >> Issue (05): 395-400.doi: 10.3866/PKU.WHXB19950503

研究论文 上一篇    下一篇

铁酸镁超微粒子的制备及结构特征

高志明, 吴通好, 彭少逸   

  1. 吉林大学化学系|长春 130023
  • 收稿日期:1994-05-16 修回日期:1994-07-04 发布日期:1995-05-15
  • 通讯作者: 高志明

Preparation and Structural Features of Ultrafine Spinel Magnesium Ferrites

Gao Zhi-Ming, Wu Tong-Hao, Peng Shao-Yi   

  1. Chemistry Department, of Jilin University,Changchun 130023
  • Received:1994-05-16 Revised:1994-07-04 Published:1995-05-15
  • Contact: Gao Zhi-Ming

摘要:

采用两种方法制得了尖晶石结构纯相MgFe2O4样品.Moessbauer分析发现,一种样品表现出了完全的超顺磁性,另一种表现出了部分超顺磁性.这揭示出了样品具有很小的粒子尺度.首次在实验上发现了MgFe2O4IR-V2谱带的劈裂现象,报导了拉曼光谱,通过ESR分析,进一步揭示了两样品的结构特征,并讨论了性质之间的相关性。

关键词: 超微粒子, 铁酸镁, ESR, IR, Moessbauer谱

Abstract:

Single phase magnesium ferrites (MgFe2O4) were obtained by two different procedures. The observation by TEM suggested that the two samples were with particle sizes below 20.0nm. The results of Moessbauer spectra taken at 298K subsequently re vealed the completely or partially superparamagnetic natures of the two samples for their fine particle volume. Far-IR results first demonstrated the presence of double-splitting of V2 band for MgFe2O4. The difference of structural features between the two samples was found by ESR analyses. The reason was discussed.

Key words: Ultrafine particle, MgFe2O4, ESR, IR, Moessbauer spectra