TY - JOUR
T1 - Effect of intergranular glass films on the electrical conductivity of 3Y-TZP
AU - Godickemeiei, M.
AU - Michel, B.
AU - Orliukas, A.
AU - Bohac, P.
AU - Sasaki, K.
AU - Gauckler, L.
AU - Heinrich, H.
AU - Schwander, P.
AU - Kostorz, G.
AU - Hofmann, H.
AU - Frei, O.
N1 - Funding Information:
This work was financially supported by the Alusuisse-Lonza Corporation and the Swiss Federal Office of Energy (OFEN). The authors express their gratitude to Dr. L. Dubai from OFEN for his support and continuous interest and Professor P.D. Ownby for helpful discussions and reviewing the manuscript.
PY - 1994/5
Y1 - 1994/5
N2 - The electrical conductivity of 3Y-TZP ceramics containing Si02 and A1203 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 Th 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.
AB - The electrical conductivity of 3Y-TZP ceramics containing Si02 and A1203 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 Th 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.
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U2 - 10.1557/JMR.1994.1228
DO - 10.1557/JMR.1994.1228
M3 - Article
AN - SCOPUS:0028436509
SN - 0884-2914
VL - 9
SP - 1228
EP - 1240
JO - Journal of Materials Research
JF - Journal of Materials Research
IS - 5
ER -