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Nanocrystalline Zirconia Ceramics and Films Prepared by Chemical Vapor Synthesis and Deposition

Published online by Cambridge University Press:  21 March 2011

Johannes Seydel ,
Markus Winterer  and
Horst Hahn
Johannes Seydel
Affiliation:
Darmstadt University of Technology, Institute of Materials Science, Petersenstrasse 23, 64287 Darmstadt, Germany
Markus Winterer
Affiliation:
Darmstadt University of Technology, Institute of Materials Science, Petersenstrasse 23, 64287 Darmstadt, Germany
Horst Hahn
Affiliation:
Darmstadt University of Technology, Institute of Materials Science, Petersenstrasse 23, 64287 Darmstadt, Germany
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Abstract

We have prepared thin yttria-stabilized zirconia (YSZ) electrolyte layers by chemical vapor deposition (CVD) on a pre-sintered NiO/YSZ fuel cell anode substrate. Structural analysis by scanning electron microscopy (SEM) and x-ray-diffraction shows a homogeneous, nanocrystalline layer.

Conventional electrolyte films reach desired electrical properties only at elevated temperatures, typically 1000°C to 1100°C. The YSZ films grown by CVD on rough anode substrates show better growth behavior and less defects at the anode/electrolyte interface than films deposited by conventional methods (screen printing, sol-gel). Results of electrical properties at lower SOFC working temperatures are obtained by impedance spectroscopy on pressed nanocrystalline YSZ powder pellets produced by chemical vapor synthesis (CVS).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 676: Symposium Y – Synthesis, Functional Properties and Applications of Nanostructures , 2001 , Y8.14
Copyright
Copyright © Materials Research Society 2001

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References

REFERENCES

1. Badwal, S. P. S., Foger, K., “Solid Oxide Electrolyte Fuel Cell Review” Ceramics International 22, 257–265 (1996)Google Scholar
2. Srdic, V., Winterer, M. and Hahn, H., “Sintering Behaviour of Nanocrystalline Zirconia Prepared by Chemical Vapor Synthesis” J. Am. Ceram. Soc. 83, 729 (2000)Google Scholar