Journal
SOLID STATE IONICS
Volume 157, Issue 1-4, Pages 29-33Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0167-2738(02)00185-6
Keywords
Gerischer impedance; solid state diffusion; mixed conductivity; Tb-doped YSZ; ionically blocking electrodes
Categories
Ask authors/readers for more resources
The Gerischer impedance in its most elementary form, Z(G)(omega)=Z(0)(k+jomega)(-1/2), has been observed in the frequency response of mixed conducting solid electrolyte systems. This simple transfer function can be derived directly from Fick's second law by including a reaction term. The Gerischer impedance was observed in the electrode dispersion of heavily Tb-doped yttria-stabilised zirconia (YSZ) ceramics. The mixed conducting samples were provided with ionically blocking gold electrodes. The occurrence of a Gerischer impedance in the Tb-YSZ system is tentatively modelled with the formation of immobile complexes of oxygen vacancies and trivalent cations. The presented results indicate that for mixed conducting materials it is not allowed to represent the electronic and ionic conduction path as independent components in an equivalent circuit. (C) 2002 Elsevier Science B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available