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Influence of the Metal/Ceramic Interface Characteristics on Conductivity Measurements of Na-β" Alumina by Impedance Spectroscopy

Published online by Cambridge University Press:  25 February 2011

M. Schreiber ,
E. Butchereit  and
C. Lutz
M. Schreiber
Affiliation:
Daimler-Benz AG, Materials Research Laboratory, Ulm, Germany
E. Butchereit
Affiliation:
Daimler-Benz AG, Materials Research Laboratory, Ulm, Germany
C. Lutz
Affiliation:
Daimler-Benz AG, Materials Research Laboratory, Ulm, Germany
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Abstract

The quality of the metal/ceramic interface of solid ionically conducting materials is an important when undertaking impedance spectroscopy measurements. One major concern is the contact area between the metal and the ceramic. This work focussed on the treatment of the ceramic to the metal application by utilizing a standard quality Na-β" alumina. Next, a number of different metals were applied to the ceramic surface by different techniques, i.e. sputtering and evaporation, to serve as blocking electrodes in impedance spectroscopy measurements. The impedance spectroscopy measurements were carried out at temperatures from 30 - 300°C over a frequency range from 1 to 5 ×105 Hertz. The results are discussed in terms of the various parameters of impedance plots. Surface analysis techniques were applied to investigate the metal/ceramic interface before and after impedance spectroscopy measurements.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 293: Symposium U – Solid State Ionics III , 1992 , 337
Copyright
Copyright © Materials Research Society 1993

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