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Constrained Sintering of Yttria-Stabilized Zirconia Electrolytes: The Influence of Two-Step Sintering Profiles on Microstructure and Gas Permeance

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Abstract:

Two-step sintering was applied to yttria-stabilized zirconia (YSZ) electrolytes screen-printed on primed porous prefired substrates. The YSZ layers were sintered at a range of peak and dwell temperatures. Relative density values from 0.79 to 0.97 corresponded to grain sizes ranging from 0.6 to 10 m, indicating that grain growth was not suppressed when applying these profiles to a constrained system. However, two of the samples sintered using the two-step technique had a lower gas permeance compared with conventional samples. As the more successful two-step profiles had lower peak temperatures than the conventional profile, this approach may provide other benefits.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1744-7402.2008.02263.x

Affiliations: School of Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom

Publication date: November 1, 2008

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