Tracer oxygen diffusion coefficients, D*, in polycrystalline yttria doped with Ca have been determined by a gas–solid exchange technique and secondary ion mass spectrometry. Samples containing few pores were used to avoid their influences on diffusion profiles. The resulting profiles were assigned only to volume diffusion; no grain boundary diffusion was observed. According to the effects of Ca doping on D*, the Ca contents are divided into three regions. In a Ca content region of 0–0.17 mol%, D* changed a little with Ca doping and took a minimum experimentally at 0.02 mol%. D* increased significantly within a range of 0.17–0.54 mol% and saturated at 0.54 mol% or above because of a solubility limit. The activation energies of oxygen diffusion were estimated at 249–282 kJ/mol.
R.W.G. Wyckoff, Crystal Structure, 2nd ed. (Interscience Publisher, New York, 1967), Vol. 2, p. 4.
K. Ando, Y. Oishi, and H. Hase, J. Am. Ceram. Soc. 66, C-222 (1983).
K. Ando and Y. Oishi, in Proc. of Transport in Non Stoichiometric Compounds, edited by G. Simkovich and V.S. Stubican (Plenum, New York, 1985), p. 203.
Y. Larring, T. Norby, and P. Kofstad, Solid State Ionics 49, 73 (1991).
K. Katayama, H. Osawa, T. Akiba, and H. Yanagida, J. Eur. Ceram. Soc. 6, 39 (1990).
K. Ando, Y. Oishi, and Y. Hidaka, J. Chem. Phys. 65, 2751 (1976).
N. Saito, S. Matsuda, and T. Ikegami, J. Am. Ceram. Soc. 81, 2023 (1998).
H. Haneda and C. Monty, J. Am. Ceram. Soc. 72, 1153 (1989).
H.P. Klug and L.E. Alexander, X-Ray Diffraction Procedures for Polycrystalline and Amorphous Materials, 2nd ed. (Wiley, New York, 1974), p. 594.
J. Brown and T.H. Etsell, Solid State Ionics, 57, 251 (1992).
J. Crank, The Mathematics of Diffusion, 2nd ed. (Oxford University Press, Oxford, United Kingdom, 1975), Chap. 3.3.
H. Haneda, N. Saito, I. Sakaguchi, and T. Ikegami (submitted).
N. Saito and H. Haneda (unpublished).
F.A. Kröger and H.J. Vink, Solid State Phys. 3, 307 (1956).
N.N. Tallan and R.W. Vest, J. Am. Ceram. Soc. 49, 401 (1966).
P. Kofstad, Nonstoichiometry, Diffusion, and Electrical Conductivity in Binary Metal Oxides (Wiley-Interscience, New York, 1972), Chap. 3.
J. Philibert, Diffusion et Transport de Maitère dans les Solides (Diffusion and Transport of Materials in Solids) (Les Éditions de Phisique, Paris, France, 1985), p. 91.
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Saito, N., Haneda, H., Sakaguchi, I. et al. Effect of the calcium dopant on oxide ion diffusion in yttria ceramics. Journal of Materials Research 16, 23 (2001). https://doi.org/10.1557/JMR.2001.0324