Hostname: page-component-cd9895bd7-fscjk Total loading time: 0 Render date: 2024-12-28T15:46:15.617Z Has data issue: false hasContentIssue false
  • English
  • Français

Ionic transport in LiNbO3

Published online by Cambridge University Press:  31 January 2011

Apurva Mehta ,
Edward K. Chang  and
Donald M. Smyth
Apurva Mehta
Affiliation:
Materials Research Center, Bldg. 5, Lehigh University, Bethlehem, Pennsylvania 18015
Edward K. Chang
Affiliation:
Materials Research Center, Bldg. 5, Lehigh University, Bethlehem, Pennsylvania 18015
Donald M. Smyth
Affiliation:
Materials Research Center, Bldg. 5, Lehigh University, Bethlehem, Pennsylvania 18015
Get access

Abstract

The high temperature equilibrium conductivity (950 °C–1050 °C) of congruent LiNbO3 can be resolved into two components: an electronic portion that is dependent on the oxygen partial pressure and an ionic portion that is pressure independent. It is shown that the two components can be obtained from an analysis of the total equilibrium conductivity measured as a function of oxygen partial pressure. The ionic transport number (fractional ionic conductivity) thus obtained is compared with that obtained from an oxygen concentration cell measurement. The two techniques are found to be in excellent agreement, confirming the experimental validity of the defect chemistry method. From the temperature dependence of the ionic conductivity, the activation energy (138 kJ/mol [1.43 eV]) for the ionic transport is obtained. The results are in good agreement with the value previously obtained for the oxygen chemical diffusivity.

Type
Articles
Information
Journal of Materials Research , Volume 6 , Issue 4 , April 1991 , pp. 851 - 854
Copyright
Copyright © Materials Research Society 1991

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1Fay, H., Alford, W. J., and Dess, H. M., Appl. Phys. Lett. 12, 89 (1968).CrossRefGoogle Scholar
2Lerner, P., Legras, C., and Duman, J. P., J. Cryst. Growth 3/4, 231 (1968).CrossRefGoogle Scholar
3Abrahams, S. C. and Marsh, P., Acta Crystallogr. B42, 61–68 (1986).CrossRefGoogle Scholar
4Chang, E. K., Mehta, A., and Smyth, D. M., Adv. in Ceram. 23, 351 (1987).Google Scholar
5Smyth, D. M., Proceedings of the Sixth IEEE Int. Symp. on Application of Ferroelectrics, ISAF '86, 115 (1986).Google Scholar
6Jorgensen, P. J. and Bartlett, R. W., J. Phys. Chem. Solids 30, 2639 (1969).CrossRefGoogle Scholar
7Bergmann, G., Solid State Commun. 6, 77 (1968).CrossRefGoogle Scholar
8Limb, Y., Cheng, K. W., and Smyth, D. M., Ferroelectrics 38, 813 (1981).CrossRefGoogle Scholar
9Chang, E. K., Mehta, A., and Smyth, D. M., Proc. of the Symp. on Electro-ceramics and Solid-state Ionics, edited by Tuller, Harry L. and Smyth, Donald M. (The Electrochemical Society Proceedings, 1988), Vol. 88–3, p. 35.Google Scholar
10Heyne, L., Proceedings of a Symposium, Oct. 22–25, 1967, NBS special publication#296.Google Scholar
11Chan, H. M., Zhuang, Z., and Smyth, D. M., in Defect Properties and Processing of HighTechnology Nonmetallic Materials, edited by Chen, Y., Kingery, W. D., and Stokes, R. J. (Mater. Res. Soc. Symp Proc. 60, Pittsburgh, PA, 1986), p. 95.Google Scholar
12Peterson, G. E. and Carnevale, A., J. Chem. Phys. 56, 4848 (1972).CrossRefGoogle Scholar
13Holmes, R. J. and Smyth, D. M., J. Appl. Phys. 55 (10), 3531 (1984).CrossRefGoogle Scholar