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Electrical conductivity/microstructural relationships in aged CaO and CaO + MgO partially-stabilized zirconia

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Abstract

Samples of CaO and CaO + MgO partially-stabilized zirconia (PSZ), solution treated at 1830° C and aged at 1400° C to produce a fine dispersion of tetragonal precipitates, were subjected to a.c. electrical measurements in the frequency range 10−3 to 106 Hz, at a temperature of 300° C. The component of resistivity due to the grain interiors, obtained from plots of complex resistivity, showed three stages of behaviour, attributed to equilibration, coarsening and finally transformation of a tetragonal precipitate into a more resistive monoclinic phase. A model of the electrical response of a dispersion of particles was used to estimate the conductivities of the constituent phases of the PSZ ceramic and to simulate the complex resistivity data obtained.

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Authors and Affiliations

  1. Wolfson Unit for Solid State Ionics, Department of Metallurgy and Materials Science, Imperial College of Science and Technology, London SW7, UK

    N. Bonanos, R. K. Slotwinski, B. C. H. Steele & E. P. Butler

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  1. N. Bonanos
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  2. R. K. Slotwinski
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  3. B. C. H. Steele
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  4. E. P. Butler
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Bonanos, N., Slotwinski, R.K., Steele, B.C.H. et al. Electrical conductivity/microstructural relationships in aged CaO and CaO + MgO partially-stabilized zirconia. J Mater Sci 19, 785–793 (1984). https://doi.org/10.1007/BF00540449

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  • DOI: https://doi.org/10.1007/BF00540449

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