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Composition dependence of the ionic diffusion coefficients in yttria-stabilized zirconias |
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| Affiliation: | 1. Institute of Inorganic and Analytical Chemistry, Univ. of Muenster, Corrensstr. 28, 48149 Muenster, Germany;2. Graduate School of Chemistry, Univ. of Muenster, Wilhelm-Klemm. Str. 10, 48149 Muenster, Germany;1. Saitama University, Graduate School of Science and Engineering, 255 Shimo-Okubo, Sakura-ku, Saitama, 3388570 Japan;2. Forschungszentrum Jülich GmbH, IEK-2, 52425 Jülich, Germany |
| Abstract: | The diffusion coefficient of the O2− ions in yttria-stabilized zirconia (1−x)ZrO2·xYO1.5 has been investigated as a function of the concentration of Y3+ ion over a range x = 0.131–0.261 by using quasielastic light scattering. The diffusion coefficients were deduced from the analysis of the temperature dependence of the scattering intensity at 3 GHz. It is concluded that the diffusion coefficient reaches its maximum value at x = 0.165. The composition dependence of the scattering intensity suggests that the concentration of the moving carrier decreases as the Y3+ content increases in spite of an increase of the oxygen vacancies. |
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