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Defect structure of Co3O4cobalt oxide

Defect structure of Co₃O₄cobalt oxide

Zbigniew Grzesik| Anna Kaczmarska

Department of Physical Chemistry and Modelling, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, al. A. Mickiewicza, Krakow, 30-059, Poland

Received:

1 October 2015

| |

Accepted:

7 January 2016

| | Citation

acsm4012p103-web.pdf

OPEN ACCESS

Abstract:

The deviation from stoichiometry, y, in the Co₃O₄ oxide has been studied as a function of temperature (973-1173 K) and oxygen pressure (30-10⁵ Pa) using microthermogravimetric technique. It has been found that at low oxygen pressures, the deviation from stoichiometry decreases with increasing oxygen pressure, reaching zero value in intermediate oxygen pressure range and for higher pressures it starts to increase. This behaviour strongly suggests the presence of complex defect structure in the studied oxide. At very low oxygen pressures, close to the dissociation pressure of the oxide, interstitial cations are the predominant ionic defects, while at high pressures cation vacancies predominate. Using the obtained results of nonstoichiometry, the concentrations of predominant point defects in the studied oxide have been calculated as a function of temperature and oxygen pressure.

1. Introduction

2. MATERIALS AND EXPERIMENTAL PROCEDURE

3. Results and Discussion

4. SUMMARY

Acknowledgments

This work was supported by the statutory research of Faculty of Materials Science and Ceramics, AGH (no. 11.11 .160 .257 ).

References

[1] P. Kofstad, Nonstoichiomtery, Diffusion and Electrical Conductivity in Binary Metal Oxides, J. Wiley, Interscience. New York, London, Sydney, Toronto, $1972 .$

[2] S. Mrowec, Defect and Diffusion in Solids, Elsevier, Amsterdam, Oxford, New York, Tokyo, 1978.

[3] P. Kofstad, High Temperature Corrosion, Elsevier, Amsterdam, Oxford-New York, 1988.

[4] S. Mrowec, An Introduction to the Theory of Metal Oxidation, National Bureau of Standards and National Science Foundation, Washington D. C., 1982.

[5] C.B. Alcock and M.G. Hocking, Trans. Inst. Min. Metall. 75C (1970) 27-36.

[6] K. Przybylski and W.W. Smeltzer, J. Electrochem. Soc. 128 (4) (1981) 897-902.

[7] A. Kaczmarska, Z. Grzesik, S. Mrowec, High Temp. Mater. Processes, 31(2012) 371-379.

[8] R. Dieckmann, Z. Phys. Chem. (N. F.) 107 (2) (1977) 189-198.

[9] R. Dieckmann, Solid State Ionics $12(1984) 1-15$

[10] Z. Grzesik, Defect and Diffusion Forum 237-240 (2005) 139-144.

[11] F. Kröger, The Chemistry of Imperfect Crystals, North Holland, Amsterdam, 1964.

[12] C. Wagner and E. Koch, Z. Physik. Chem. B32 (1936) 439-446.

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Defect structure of Co3O4cobalt oxide