Skip to main content Accessibility help
×
Home

Effects of Microstructure on Oxygen Permeation in Some Perovskite Oxides

  • K. Zhang (a1), Y. L. Yang (a1), A. J. Jacobson (a1) and K. Salama (a1)

Abstract

The effects of microstructure on the oxygen permeation in SrCo0.8Fe0.2O3-δ(SCFO) and La0.2 Sr0.8 Fe0.8Cr0.2 O3 (LSFCO) was investigated using disc samples fabricated under different processing conditions. The microstructure of LSFCO remained unchanged when the sintering temperature was increased from 1300 to 1450 °C, but the average grain size of SCFO increased considerably when the sintering temperature was increased from 930 to 1200 °C. The change in grain size was found to have a strong effect on the oxygen permeation flux in SCFO, which increased considerably as the grain size was decreased. This indicates that the contribution of the grain boundary diffusion to the steady state oxygen flux in SCFO is substantial and grain boundaries provide faster diffusion paths in oxygen permeation through the samples.

Copyright

References

Hide All
1. Ma, B., Balachandran, U., Park, J.-H., and Segre, C. U., Solid State Ionics, 83, 65 (1996).
2. Minh, N. Q., J. Am. Ceram. Soc., 76, 563 (1993).
3. Teraoka, Y., Nobunaga, T., and Yamazoe, N., Chem. Lett., 83, 503 (1988).
4. Teraoka, Y., Zhang, H. -M.. Furukawa, S., and Yamazoe, N., Chem. Lett., 80, 1743 (1985).
5. Kruidhof, H., Bouwmeester, H. J. M., Doorn, R. H. E. V. and Burggraaf, A. L., Solid State Ionics, 63–65, 816 (1993).
6. Qiu, L., Lee, T. H., Liu, L. M., Yang, Y. L., and Jacobson, A. J., Solid State Ionics, 76, 321 (1995).
7. Van Hassel, B. A., Kawada, T., Sakai, N., Yokokawa, H., and Dokiya, M., Solid State Ionics, 66, 41 (1993).
8. Lee, T. H., Yang, Y. L., Jacobson, A. J., Abeles, B. and Milner, S., Solid State Ionics, 100, 77 (1997).10.1016/S0167-2738(97)00257-9
9. Sutton, A. P. and Balluffi, R. W., in Interfaces in Crystalline Materials (Oxford Science Publications, London, 1995) p. 467.
10. Badwal, S. P. S., and Drennan, J., J. Mater. Sci., 22, 3231 (1987).10.1007/BF01161187
11. Kawada, T., Fiorita, T., Sakai, N., Yokokawa, H., and Dokiya, M., Solid State Ionics, 79, 201 (1995).10.1016/0167-2738(95)00062-B
12. Zhang, K., Yang, Y. L., Ponnusamy, D., Jacobson, A. J., and Salama, K., Effect of Microstructure on Oxygen Permeation in SrCo0.8Fe0.2O3-δ, submitted to J. Mater. Sci‥

Effects of Microstructure on Oxygen Permeation in Some Perovskite Oxides

  • K. Zhang (a1), Y. L. Yang (a1), A. J. Jacobson (a1) and K. Salama (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed