Chem. J. Chinese Universities ›› 1998, Vol. 19 ›› Issue (10): 1537.

• Articles • Previous Articles     Next Articles

Studies on the Property of Oxygen-deficient Ferrite MFe2O4-δ

ZHANG Chun-Lei1, LI Shuang1, PENG Yan-Bing1, WU Tong-Hao1, ZHANG Mi-Lin1, PENG Shao-Yi2   

  1. 1. Department of Chemistry, Jilin University, Changchun, 130023;
    2. Shanxi Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001
  • Received:1997-08-29 Online:1998-10-24 Published:1998-10-24

Abstract: In the present paper, the lattice constant, magnetism, stability and reducing property of oxygen-deficient ferrite MFe2O4-δ (δ >0, M=Fe, Co, Mn, Ni) have been studied by XRDand Mssbauer methods. It is found that the lattice constant of MFe2O4-δ (δ>0) is larger than that of MFe2O 4+δ, while its internal magnetic field is smaller than that of MFe2O 4+δ. With increasing the deficiency degree δ, the lattice constant increased, and the internal magnetic field decreased. MFe2O4-δ is unstable in air at room temperature, but it can exist steadily in inert gas at low temperature(<673 K), MFe2O4-δ possesses very strong reducing power and can reduce CO2 to Cat 573 K.

Key words: Oxygen deficient ferrite, Lattice constant, Magnetism, Stability, Reducing property

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