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

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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.

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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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Authors and Affiliations

  1. School of Materials Science & Engineering, Nanjing University of Technology, Nanjing, 210009, P.R. China

    Yanwei Zeng, Changan Tian & Junliang Liu

Authors
  1. Yanwei Zeng
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  2. Changan Tian
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  3. Junliang Liu
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Corresponding author

Correspondence to Yanwei Zeng.

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Zeng, Y., Tian, C. & Liu, J. Convection–diffusion derived gradient films on porous substrates and their microstructural characteristics. J Mater Sci 42, 2387–2392 (2007). https://doi.org/10.1007/s10853-006-1277-z

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  • DOI: https://doi.org/10.1007/s10853-006-1277-z

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