Experimental determinations of the absorptivity and of the total hemispherical emissivity of plasma-sprayed ZrO2-7wt%Y2O3 layers were performed in the range of temperature 1000 K–2300 K. For this purpose, solar facilities of CNRS-IMP laboratory were used. The experimental set-up is described and the obtained results are presented and discussed. The spectral absorptivity at 0.65 μm ranges from 0.10 below 1000 K to 0.75 at 2300 K, and the total hemispherical emissivity increases from 0.25 at 1300 K up to 0.60 at 2200 K. [S0199-6231(00)00301-4]

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