Abstract

E.m.f. measurements on the cell Pt | O2| CaO(+ CaF2)‖ CaF2(tF–= I)‖ ZrO2–CaO | O2| Pt have been carried out in the temperature range 900–1100°C to measure thermodynamic parameters of the lime + zirconia solid solutions and, possibly, to obtain complementary information on the phase-relationships across the concentration range investigated. Results show that the cubic field ranges only between xCaO= 0.14 and 0.17 and that at xCaO= 0.2 a CaZr4O9 phase is probably present. The results are discussed and compared with published data on the topic.

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