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Journal of Materials Science

, Volume 42, Issue 7, pp 2387–2392 | Cite as

Convection–diffusion derived gradient films on porous substrates and their microstructural characteristics

  • Yanwei Zeng
  • Changan Tian
  • Junliang Liu
Article

Abstract

By virtue of the convection–diffusion effect of solution in porous solid media, an alumina substrate-supported electrolyte film (YSZ) with gradient microstructure has been successfully fabricated for the first time and structurally characterized by SEM and XRD–ADA (angular dispersion analysis). This novel fabrication technique is simple, controllable, economical and potentially applicable to fabricating electrode-supported gradient electrolyte films for SOFCs. The so-prepared YSZ-film/substrate structures are featured with a dense YSZ film of ∼10 μm, a uniform filling layer of ∼50 μm just beneath the interface and a successive diffuse layer stretching as deep as ∼250 μm within the porous substrate matrix.

Keywords

Functionally Grade Material Composite Cathode Porous Substrate Electrolyte Film Functionally Grade Material 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The financial support from the Committee for Science and Technology of Jiangsu, P.R. China through Grant BK2002018, 2002 is gratefully acknowledged.

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Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  1. 1.School of Materials Science & Engineering Nanjing University of TechnologyNanjingP.R. China

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