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Iron oxide films of a spinel structure from thermal decomposition of metal ion citrate complex

Published online by Cambridge University Press:  31 January 2011

Naofumi Uekawa  and
Katsumi Kaneko
Naofumi Uekawa
Affiliation:
Department of Applied Chemistry, Faculty of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba-shi 263 Japan
Katsumi Kaneko
Affiliation:
Department of Chemistry, Faculty of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba-shi 263, Japan
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Abstract

Iron oxide films were prepared by the polymer precursor method with alkaline metal (Li, Na, and K) ion doping. Alkaline metal ions were used to regulate the thermal decomposition process of the cation-citrate complex, that is, the precursor of the film. The spinel iron oxide films were obtained by firing the precursor with the alkaline ion doping [Na/Fe (atomic ratio) ≧ 0.2 and K/Fe (atomic ratio) ≧ 0.2] at 773 K for 5 min in air. The formation mechanism of the spinel iron oxide films was investigated by differential thermal analysis (DTA) and x-ray photoelectron spectroscopy (XPS) measurements. Formation of the carbon-iron oxide complex was observed, and this reduction atmosphere induced the formation of the spinel iron oxide films. This method gave the spinel iron oxide films of which nanostructures are controlled.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 5 , May 1999 , pp. 2002 - 2006
Copyright
Copyright © Materials Research Society 1999

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References

REFERENCES

1.Pechini, M., U.S. Patent No. 3,330,697 (11 July 1967).Google Scholar
2.Baythoun, M.S.G and Sale, F. R., J. Mater. Sci. 17, 2757–2769 (1982).Google Scholar
3.Tai, L.W. and Lessing, P.A., J. Mater. Res. 7, 502–510 (1992).CrossRefGoogle Scholar
4.Tai, L.W. and Lessing, P.A., J. Mater. Res. 7, 511–519 (1992).Google Scholar
5.Zhang, S.C., Messing, G. L., Hübner, W., and Coleman, M. M., J. Mater. Res. 5, 1806–1812 (1990).CrossRefGoogle Scholar
6.Uekawa, N., Watanabe, M., and Kaneko, K., J. Chem. Soc. Faraday Trans. 91, 2161 (1995).CrossRefGoogle Scholar
7.Uekawa, N. and Kaneko, K., J. Phys. Chem. 100, 4193–4198 (1996).CrossRefGoogle Scholar
8.Kofstad, P., in Nonstoichiometry, Diffusion, and Electrical Conductivity in Binary Metal Oxides (John Wiley & Sons, New York, 1962), pp. 221–223.Google Scholar
9.Dousma, J. and de Bruyn, P. L., J. Colloid and Interface Sci. 56, 527–539 (1976).Google Scholar
10.Kamnev, A.A. and Ristić, M., J. Mol. Struct. 408/409, 301–304 (1997).Google Scholar
11.Yamashita, Y. and Ouchi, K., Carbon 20, 41–46 (1982).Google Scholar
12.Yamashita, Y. and Ouchi, K., Carbon 20, 47–50 (1982).Google Scholar
13.Harvey, D.T. and Linton, R.W., Anal. Chem. 53, 1684–1688 (1981).Google Scholar
14.Young, V., Carbon 20, 35–39 (1982).Google Scholar