Oxidation of Cobalt at High Temperatures and Self-Diffusion in Cobaltous Oxide

  • S. Mrowec
  • K. Przybylski


The cobalt-cobaltous oxide-oxygen system has been for many years a subject of much interest owing to its model character in studies on kinetics and mechanism of metal oxidation,as well as on semiconducting and transport properties of transition metal oxides. In the present work an attempt has been made to determine precise values of parabolic rate constants of cobalt oxidation in the wide range of temperatures /950–1300°C/ and oxygen pressures /6.58 · 10−4–0.658 atm/. From these data self-diffusion coefficients of cobalt in cobaltous oxide /Co1-y0/ and activation energy and the pressure dependence of this process have been calculated. The total concentration of defects in cobaltous oxide as dependent on two parameters mentioned above have been also derived.


Oxygen Pressure Cobaltous Oxide Transition Metal Oxide High Temperature Oxidation Cation Vacancy 
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  1. 1.
    S.Mrowec, M.Lasori, E.Fryt, K.Przybylski and A.Ciembroniewicz, J.Therm.Anal. 6, 193 /1974/.CrossRefGoogle Scholar
  2. 2.
    S.Mrowec, A.Stokxosa, Werkstoffe u.Korrosion 21, 934 /1970/.CrossRefGoogle Scholar
  3. 3.
    P.Kofstad, “High Temperature Oxidation of Metals”, J.Wiley, 1966, p. 122, 127.Google Scholar
  4. 4.
    C.Wagner, “Diffusion and High Temperature Oxidation of Metals” in Atom Movements A.S.M. Cleveland, 1951;, p.153.Google Scholar
  5. 5.
    K.Fueki, J.B.Wagner, J.Electrochem.Soc., 112, 384 /1965/.Google Scholar
  6. 6.
    R.E.Carter, I.D.Richardson, Trans.AIME., 200, 1244 /1954/Google Scholar
  7. 7.
    J.Manning, “Diffusion kinetics for Atoms in Crystals”, Van Nostrand, New Jersey 1968, p. 95.Google Scholar
  8. 8.
    W.K.Chen, N.L.Peterson, W.T.Reeves, Phys.Rev., 186, 887 /1969/.Google Scholar
  9. 9.
    E.Fryt, S.Mrowec, T.Walec, Oxidation of Metals, 7, 117 1973/.Google Scholar
  10. 10.
    G.J.Koel, P.J.Gellings, Oxidation of Metals,5, 3 /1972/.Google Scholar
  11. 11.
    J.M.Wimmer, R.N.Blumenthal, I.Bransky, J.Phys.Chem.Solids 36, 269 /1975/.CrossRefGoogle Scholar
  12. 12.
    B.Fisher, D.S.Tannhauser, J.Chem.Phys., 44,1663 /1966/.Google Scholar
  13. 13.
    N.G.Eror, J.B.Wagner, Jr.J.Phys.Chem.Solids., 29.1597 /1968/.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1977

Authors and Affiliations

  • S. Mrowec
    • 1
  • K. Przybylski
    • 1
  1. 1.Institute of Materials ScienceAcademy of Mining and MetallurgyKrakówPoland

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