Energetics of Native Defects in Al2O3 and SiO2


Article Preview

Formation energies of various defects in Al2O3 and SiO2 are calculated by using the plane-wave pseudopotential method. Also, the formation energies of Schottky defects and Frenkel defects are evaluated on the basis of these calculations. It is shown that formation energies of these defects are higher in SiO2 than in Al2O3. In other words, less defects are formed in SiO2 than in Al2O3. It is also found that the principal defect is the cation Frenkel defect in Al2O3 but the anion Frenkel defect in SiO2. These results agree with the experimental results that Al ions diffuse preferably in Al2O3 but oxygen ions diffuse in SiO2 at high temperatures.



Materials Science Forum (Volumes 449-452)

Edited by:

S.-G. Kang and T. Kobayashi




M. Yoshino et al., "Energetics of Native Defects in Al2O3 and SiO2", Materials Science Forum, Vols. 449-452, pp. 713-716, 2004

Online since:

March 2004




[1] A. E. Paladino and W. D. Kingery: J. Chem. Phys. 37 (1965), p.957.

[2] B. Deal and A. Grove: J. Appl. Phys. 36 (1965), p.3770.

[3] S. K. Mohapatra, S. K. Tiku and F. A. Kröger: J. Am. Ceram. Soc. 60 (1979), p.50.

[4] F. Oba, S. R. Nishitani, S. Isotani, H. Adachi and I. Tanaka: J. Appl. Phys. 90 (2001), p.824.

[5] J. P. Perdew, K. Burke and Y. Wang: Phys. Rev. B 54 (1996), p.16533.

[6] V. Milman, B. Winkler, J. A. White, C. J. Pickard, M. C. Payne, E. V. Akhmatskaya and R. H. Nobes: Int. J. Quant. Chem. 77 (2000), p.895.

[7] D. Vanderbilt: Phys. Rev. B 41 (1990), p.7892.

[8] G. Chris, Van de Walle; Phys. Rev. Lett. 85 (2000), p.1012.

[9] A. F. Kohan, G. Ceder, D. Morgan; Phys. Rev. B 61 (2000), p.15019.

[10] S. K. Mohapatra and F. A. Kröger: J. Am. Ceram. Soc. 61 (1978), p.106.

[11] G. J. Dienes, D. O. Welch, C. R. Fischer, R. D. Hatcher, O. Lazareth and M. Samberg: Phys. Rev. B 11 (1975), p.3060.

DOI: 10.1103/physrevb.11.3060

[12] C. R. A. Catlow, R. James, W. C. Mackrodt and R. F. Stewart: Phys. Rev. B 25 (1982), p.1006. Table 1 Formation energies of defects in SiO2 and Al2O3.

Fetching data from Crossref.
This may take some time to load.