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. 2018 May 17;11(5):829. doi: 10.3390/ma11050829

Figure 1.

Figure 1

Figure 1

FTIR spectra for Al2O3–(20,40 wt %) ZrO2 in as-synthesized form (a,b), calcined at 600 °C (c), and after annealing at 1400 °C (d).