Zinc Self-Diffusion in ZnO


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This work deals with the study of zinc self-diffusion in ZnO polycrystal of high density and of high purity. The diffusion experiments were performed using the 65Zn radioactive isotope as zinc tracer. A thin film of the tracer was deposited on the polished surface of the samples, and then the diffusion annealings were performed from 1006 to 1377oC, in oxygen atmosphere. After the diffusion treatment, the 65Zn diffusion profiles were established by means of the Residual Activity Method. From the zinc diffusion profiles were deduced the volume diffusion coefficient and the product dDgb for the grain-boundary diffusion, where d is the grain-boundary width and Dgb is the grain-boundary diffusion coefficient. The results obtained for the volume diffusion coefficient show good agreement with the most recent results obtained in ZnO single crystals using stable tracer and depth profiling by secondary ion mass spectrometry, while for the grain-boundary diffusion there is no data published by other authors for comparison with our results. The zinc grain-boundary diffusion coefficients are ca. 4 orders of magnitude greater than the volume diffusion coefficients, in the same experimental conditions, which means that grain-boundary is a fast path for zinc diffusion in polycrystalline ZnO.



Defect and Diffusion Forum (Volumes 237-240)

Edited by:

Prof. Marek Danielewski, Robert Filipek, Prof. Rafal Abdank-Kozubski, Witold Kucza, Paweł Zięba and Zbigniew Żurek




M.A.N. Nogueira et al., "Zinc Self-Diffusion in ZnO", Defect and Diffusion Forum, Vols. 237-240, pp. 163-168, 2005

Online since:

April 2005




[1] T. K. Gupta and W. G. Carlson, J. Mater. Sci., vol. 20 (1985), p.3487.

[2] H. L. Tuller, J. Electroceramics, vol. 4: S1 (1999), p.33.

[3] K. S. Kim, Ph.D. thesis, Massachusetts Institute of Technology (1971).

[4] W. J. Moore and E. L. William, Crystal Imperfections and Chemical Reactivity of Solids. ( The Faraday Society. Aberdeen 1959).

[5] W. G. Tomlins, J. Appl. Phys., vol. 87, n1(2000), p.117.

[6] J. Philibert, Atom Movements, Diffusion and Mass Transport in Solids. Les Editions de Physique (1991).

[7] L. Badrour, E. G. Moya, J. Bernadini and F. Moya, J. Phys. Chem. Solids, vol. 50, n. 6 (1989), p.551.

[8] L. G. Harrison, Transactions of Faraday Society, vol. 57 (1961), p.1191.

[9] T. Suzuoka, J. Phys. Soc. Japan, vol 19 (1964), p.839.

[10] A. Atkinson and R.I. Taylor, Phil. Mag. A, vol. 43(1981), p.979.

[11] I. Kaur and W. Gust. Fundamentals of Grain and Interphase Boundary Diffusion. Ziegler Press, Stuttgart, 1988, 391p.

[12] Wuensch, B. and Tuller, H.L. J. Phys. Solids vol. 55, No. 10 (1994) p.975.

[13] Yanagida, H. et al. The Chemistry of Ceramics, Wiley, England, (1996).

[14] A.C.S. Sabioni, Solid State Ionics, vol. 170, Issues1-2 (2004), p.145.

[15] R.D. Shanon, Acta Crystallographica, A32 (1976), p.751.