高等学校化学学报

高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (10): 1537.

• 论文 • 上一篇    下一篇

氧缺位铁酸盐MFe2O4-δ的性质研究

张春雷1, 李爽1, 彭艳兵1, 吴通好1, 张密林1, 彭少逸2   

  1. 1. 吉林大学化学系, 长春, 130023;
    2. 中国科学院山西煤炭化学研究所, 太原, 030001
  • 收稿日期:1997-08-29 出版日期:1998-10-24 发布日期:1998-10-24
  • 通讯作者: 张春雷,男,29岁,博士,副教授.
  • 作者简介:张春雷,男,29岁,博士,副教授.
  • 基金资助:

    国家自然科学基金(批准号:29703002)资助课题.

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

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摘要： 使用XRD、Mössbauer谱及化学组成分析考察了氧缺位铁酸盐MFe2O4-δ(δ＞0,M＝Fe,Co,Mn,Ni)的晶格常数、磁性、稳定性及还原性.结果表明,氧缺位铁酸盐MFe2O4-δ(δ＞0)的晶格常数比MFe2O4+δ(δ≥0)的大,Mössbauer谱内磁场却更小.MFe2O4-δ(δ＞0)随着氧缺位程度δ的增大,晶格常数增大,内磁场减小.MFe2O4-δ在室温下空气中是不稳定的,只能在惰性气体中低温(＜673K)下稳定存在.MFe2O4-δ具有较强的还原能力,在573K下能将CO2还原成C.

关键词: 氧缺位铁酸盐, 晶格常数, 磁性, 稳定性, 还原性

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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