Abstract
The resistivity of a very stable high purity specimen of (ZrO 2) 0.90(Y 2O 3) 0.10 has been measured between 400° and 1000°C. It is found that the dependence of the resistivity ϱ on temperature is precisely described by ϱ T =A 1e E 1 kT + A 2e E 2 kT where the A's and E's are empirically determined constants. Two hypotheses which yield such a temperature dependence are discussed. The first involves vacancy trapping by the yttria ions. The second involves the resistance of an yttria-rich layer near the grain boundaries.
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