The simulated and the experimental electrical conductivity of ionic conductor composites (Al2O3/yttria-stabilized zirconia) either containing different amounts (5 and 50 wt.%) of alumina or having the same amount of insulating phase (10 wt.%) with different grain sizes are presented and compared. A digital image-based modelling procedure to simulate the electrical behaviour of the composites was used here. The method works, generating, by the Voronoi tessellation technique in which a genetic algorithm is used, two-phase polyhedral microstructures and then converting them into a random electrical network. The real and imaginary part of the electrical network impedance was computed by the transfer matrix method. The model is able to reproduce the experimental results well.
Composite materials as electrolytes for solid oxide fuel cells: simulation of microstructure and electrical properties
SCHMID, CHIARA;
2002-01-01
Abstract
The simulated and the experimental electrical conductivity of ionic conductor composites (Al2O3/yttria-stabilized zirconia) either containing different amounts (5 and 50 wt.%) of alumina or having the same amount of insulating phase (10 wt.%) with different grain sizes are presented and compared. A digital image-based modelling procedure to simulate the electrical behaviour of the composites was used here. The method works, generating, by the Voronoi tessellation technique in which a genetic algorithm is used, two-phase polyhedral microstructures and then converting them into a random electrical network. The real and imaginary part of the electrical network impedance was computed by the transfer matrix method. The model is able to reproduce the experimental results well.Pubblicazioni consigliate
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