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Effect of intergranular glass films on the electrical conductivity of 3Y-TZP

Gödickemeier, M. ; Michel, B. ; Orliukas, A. ; Bohac, P. ; Sasaki, K. ; Gauckler, L. ; Heinrich, H. ; Schwander, P. ; Kostorz, G. ; Hofmann, H. ; Frei, O.

In: Journal of Materials Research, 1994, vol. 9, no. 5, p. 1228-1240

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    Titel
    • Effect of intergranular glass films on the electrical conductivity of 3Y-TZP
    Autor
    • Gödickemeier, M.. Nichtmetallische Werkstoffe, ETH Zürich, CH-8092 Zürich, Switzerland
    • Michel, B.. Nichtmetallische Werkstoffe, ETH Zürich, CH-8092 Zürich, Switzerland
    • Orliukas, A.. Nichtmetallische Werkstoffe, ETH Zürich, CH-8092 Zürich, Switzerland
    • Bohac, P.. Nichtmetallische Werkstoffe, ETH Zürich, CH-8092 Zürich, Switzerland
    • Sasaki, K.. Nichtmetallische Werkstoffe, ETH Zürich, CH-8092 Zürich, Switzerland
    • Gauckler, L.. Nichtmetallische Werkstoffe, ETH Zürich, CH-8092 Zürich, Switzerland
    • Heinrich, H.. Institut of Applied Physics, ETH-Zürich, CH-8093 Zürich, Switzerland
    • Schwander, P.. Institut of Applied Physics, ETH-Zürich, CH-8093 Zürich, Switzerland
    • Kostorz, G.. Institut of Applied Physics, ETH-Zürich, CH-8093 Zürich, Switzerland
    • Hofmann, H.. Alusuisse Lonza Services AG, CH-8212 Neuhausen, Switzerland
    • Frei, O.. Alusuisse Lonza Services AG, CH-8212 Neuhausen, Switzerland
    Dokumententyp
    • Postprint
    Sprache
    • Englisch
    Veröffentlicht in
    • Journal of Materials Research, 1994, vol. 9, no. 5, p. 1228-1240. Cambridge University Press
    Andere elektronische Ausgabe
    Klassifikation
    • Gesundheit
    OAI-PMH-ID
    • oai:doc.rero.ch:299713
    Summary
    The electrical conductivity of 3Y-TZP ceramics containing SiO2 and Al2O3 has been investigated by complex impedance spectroscopy between 500 and 1270 K. At low temperatures, the total electrical conductivity is suppressed by the grain boundary glass films. The equilibrium thickness of intergranular films is 1-2 nm, as derived using the "brick-layer” model and measured by HRTEM. A change in the slope of the conductivity Arrhenius plots occurs at the characteristic temperature Tb at which the macroscopic grain boundary resistivity has the same value as the resistivity of the grains. The temperature dependence of the conductivity is discussed in terms of a series combination of RC elements