Abstract
To elucidate the conduction-blocking process observed in sintered electric ceramics, measurements have been carried out on a weld between two YSZ (Yttria-Stabilized Zirconia) single crystals and on YSZ-Al2O3 composites in addition to previous measurements on cracks generated at room temperature in YSZ single crystals. A fraction of the mobile oxide ions appears to be blocked at impermeable parts of the internal surfaces. The surfaces of voids (cracks, pores, and probably parts of the grain boundaries) can generate the same blocking effects as the surface of precipitated second phases.
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Dessemond, L., Muccillo, R., Hénault, M. et al. Electric conduction-blocking effects of voids and second phases in stabilized zirconia. Appl. Phys. A 57, 57–60 (1993). https://doi.org/10.1007/BF00331217
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DOI: https://doi.org/10.1007/BF00331217