Skip to main content Accessibility help
×
Home

Effects of Microstructure on the Electrical Conductivity of SrCo0.8Fe0. 2O3

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

Abstract

The effect of microstructure on the electrical conductivity of SrCO0.8Fe0.2O3_δ (SCFO) was investigated in air using a four-point dc method. In the test temperature range of 200 to 900 °C, the electrical conductivity of this material was observed to increase with the increase of the average grain size in the lower temperature region where the conductivity increases with the increase of the temperature. The activation energy is decreased with the increase of the grain size in this region, 0.04 ± 0.004 ev for 4.1μm sample and 0.01 ± 0.001 ev for 14.8 μm sample. When temperature is further increased, the conductivity of this material decreases with the increase of the temperature, and the grain size effect becomes less noticeable.

Copyright

References

Hide All
1. Gur, T. M., Belzner, A. and Huggins, R. A., J. Membrane Sci., 75, p. 151 (1992).
2. Van Roosmalen, J. A. M., Cordfunke, E. H. P. and Huijsmans, J. P. P., Solid State Ionics, 66, p. 285 (1993).
3. Teraoka, Y., Nobunaga, T. and Yamazoe, N., Chemistry Letters, p. 503 (1988).
4. Garcia-Belmonte, G., Bisquert, J., Fabregat, F., Kozhukharov, V. and Carda, J. B., Solid State Ionics, 107, p. 203 (1998).
5. Minh, N. Q. and Takahashi, T., Sci. & Technology of Ceramic Fuel Cells, Elsevier Science B. V., Amsterdam, 1995, p. 128.
6. Stevenson, J. W., Armstrong, T. R., Carneim, R. D., Pederson, L. R., and Weber, W. J., J. Electrochem. Soc. 143, p. 2,722 (1996).
7. Kim, S., Yang, Y. L., Christoffersen, R., Jacobson, A. J., Solid State Ionics, 104, p. 57 (1997).
8. Hofer, H. E. and Schmidberger, R., J. Electrochem. Soc., 141, p. 782 (1994).
9. Zhang, K., Yang, Y. L., Ponnusamy, D., Jacobson, A. J., and Salama, K., Journal of Materials Science, in press, 1997.
10. Moulson, A. J., Herbert, J. M., Electroceramics, Chapman and Hall, London, 1990, p42.
11. Tay, L. W., Nasrallah, M., Anderson, H., Sparlin, D., Solid State Ionics, 76, p. 259 (1995).
12. Badwal, S. P. S., Drennan, J., J. Mater. Sci, 22, p. 3,231 (1987).
13. Verkerk, M. J., Middelhuis, B. J. and Burggraaf, A. J., Solid State Ionics, 6, p. 159 (1982).
14. Larbalestier, D. C., Babcock, S. E., Cai, X. Y., Field, M. B., Gao, Y., Heining, N. F., Kaiser, D. L., Merkle, K., Williams, L. K., Zhang, N., Physica C, 185 –189, p. 315 (1991).
15. Sarma, C., schindler, G., Haase, D. G., Koch, C. C., Saleh, A. M., Kingon, A. I., Appl. Phys. Lett. 64, p. 109 (1994).
16. Mironova, M., Du, G., Sathyamurthy, S., and Salama, K., Phil. Mag. A. in press, 1998.

Effects of Microstructure on the Electrical Conductivity of SrCo0.8Fe0. 2O3

  • K. Zhang (a1), M. Miranova (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