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Flash-Sintering of Cubic Yttria-Stabilized Zirconia at 750°C for Possible Use in SOFC Manufacturing

Authors

  • Marco Cologna,

    Corresponding author
    1. Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, Colorado 80309-0427
      †Author to whom correspondence should be addressed. e-mail: marco.cologna@colorado.edu
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  • Andre L. G. Prette,

    1. Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, Colorado 80309-0427
    2. DIMTI, University of Trento, Italy, 38050 Trento, Italy
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  • Rishi Raj

    1. Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, Colorado 80309-0427
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  • M. Menon—contributing editor

  • This work was supported by the Basic Energy Sciences Division of the Department of Energy Grant No.: DE-FG02-07ER46403.

†Author to whom correspondence should be addressed. e-mail: marco.cologna@colorado.edu

Abstract

We show that cubic 8 mol% yttria (8YSZ) can be sintered at 750°C with the application of DC electrical fields; in comparison the lowest sintering temperature for 3YSZ was 850°C. Furthermore, cubic zirconia exhibits the onset of flash sintering at 30 V/cm, whereas 3YSZ begins flash sintering at 60 V/cm. However, the volume specific power dissipation for the onset of flash sintering remains similar at ∼10 mW/mm3. The easier sintering of 8YSZ is ascribed to its higher ionic conductivity.

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