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(a) XRD analyses and (b) FTIR spectrometry of the nanopowder as prepared (—) as well as calcined at 500 °C (
), 900 °C (
), 1100 °C (
), and 1350 °C (
), labelling “t” denotes tetragonal zirconia, “γ”, “δ”, “θ”, and “α” denote the alumina phases, and “*” marks yttria reflections.
