Alternating-current conductivity and permittivity measurements were carried out on samples with Y2O3 contents that ranged from 9.6 to 25.5mol%. A plot of conductivity versus frequency exhibited a plateau conductivity plus a frequency-dependent term. An analysis of the latter term yielded an estimated binding energy, for the Y-associated O vacancy, of 0.29eV. This value compared favorably with published data. It was concluded that experimental determinations of the frequency dependence of the conductivity provided an effective basis for understanding the ionic conductivity mechanism.

Permittivity and AC Conductivity in Yttria-Stabilized Zirconia. F.E.G.Henn, R.M.Buchanan, N.Jiang, D.A.Stevenson: Applied Physics A, 1995, 60[5], 515-9