Abstract
Diffusion of oxygen in monodinic zirconia was studied using the oxygen-18 gas-solid exchange technique. The zirconia was in the form of spheres prepared by dropping the powdered material through a high temperature plasma. Diffusion was measured as a function of equivalent oxygen pressure, using oxygen and CO-CO2 mixtures, over the range 1 to 10−21 atm. In pure oxygen at 700 Torr and between 600 and 1000°C, the diffusion is described by the equation,D ⋆=2.34×10−2 exp — (45,300±1200)/RT. Experiments in CO-CO2 mixtures at 850°C gave self-diffusion coefficients that showed a slight decrease with a decrease in\(P_{O_2 } \) D ⋆ from 10−6 atm, and finally a decrease inD ⋆ from 10−19 to 10−21 atm. The behavior ofD ⋆ with\(P_{O_2 } \) appears to be in agreement with a defect model involving anti-Frenkel imperfections, i.e., oxygen interstitials and anion vacancies, if it is assumed that the mobility for oxygen interstitials is greater than that for oxygen vacancies.
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References
C. J. Rosa,J. Less Common Metals 16, 173 (1968).
P. Kofstad and D. J. Ruzicka,J. Electrochem. Soc. 110, 181 (1963).
R. W. Vest, N. M. Tallan, and W. C. Tripp,J. Am. Ceram. Soc. 47, 635 (1964).
R. W. Vest and N. M. Tallan,J. Am. Ceram. Soc. 48, 472 (1965).
F. A. Kroger,J. Am. Ceram. Soc. 49, 215 (1966).
S. Aronson,J. Electrochem. Soc. 108, 312 (1961).
D. L. Douglass,Corrosion of Reactor Materials (International Atomic Energy Agency, Vienna, 1962), Vol. 2, p. 223.
J. Debuigne and P. Lehr,Compt. Rend. 256, 1113 (1963).
T. Smith,J. Electrochem. Soc. 112, 560 (1965).
C. J. Rosa and W. Hagel,Trans. Met. Soc. AIME 242, 1293 (1968).
A. Madeyski and W. W. Smeltzer,Mater. Res. Bull. 3, 369 (1968).
B. Cox and J. P. Pemsler,J. Nucl. Mater. 28, 73 (1968).
A. Madeyski, D. J. Poulton, and W. W. Smeltzer,Acta Met. 17, 579 (1969).
D. L. Douglass and C. Wagner,J. Electrochem. Soc. 113, 671 (1966).
T. F. Schroeder, S. C. Carniglia, and S. C. Brown, Rocketdyne Report R-7525, Canoga Park, Calif., 24 June 1968.
C. W. Marynowski and A. G. Monroe,High Temperature Technology (Butterworths, Washington, 1964), pp. 67–84.
C. W. Marynowski, F. A. Halden, and E. P. Farley,Electrochem. Technol. 3, 111 (1965).
J. S. Watson,Can. J. Technol. 34, 373 (1956).
F. D. Richardson and C. B. Alcock, inPhysicochemical Measurements at High Temperatures, J. O'M. Bockris, J. S. White, and J. D. MacKenzie, eds. (Butterworths Scientific Publ., London, 1959), p. 138ff.
E. L. Williams,J. Am. Ceram. Soc. 48, 190 (1965).
P. C. Carman and R. A. W. Haul,Proc. Roy. Soc. 222A, 109 (1954).
G. N. Lewis and M. Randall,Thermodynamics, revised by K. G. Pitzer and L. Brewer (McGraw Hill, New York, 1961), Appendix 7.
Y. Oishi and W. D. Kingery,J. Chem. Phys. 33, 480 (1960).
D. J. Poulton and W. W. Smeltzer,J. Electrochem. Soc. 117, 378 (1970).
R. W. Ure,J. Chem. Phys. 26, 1363 (1957).
P. Kofstad,Corrosion 24, 379 (1968).
R. F. Domagala and D. J. McPherson,Trans. Met. Soc. AIME 200, 238 (1954).
F. Keneshea and D. Douglass, unpublished data.
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Keneshea, F.J., Douglass, D.L. The diffusion of oxygen in Zirconia as a function of oxygen pressure. Oxid Met 3, 1–14 (1971). https://doi.org/10.1007/BF00604736
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DOI: https://doi.org/10.1007/BF00604736