Abstract
The effect of Cu doping and calcination temperatures on photoluminescence (PL) spectra and XRD patterns of Y-stabilized ZrO2 powders was studied. The PL spectra of (Y,Cu) codoped samples showed the presence of two main PL components peaked at about 630 and 540 nm in the most samples. The increase of calcination temperature results in the non-monotonic variation of total PL intensity as well as the somewhat changes in PL spectra. The temperature increase from 500°C to 600°C results in the increase of total PL intensity and can be ascribed to the increase of crystallinity degree. The next PL intensity decrease with temperature rise up to 800-900°C is attributed to the appearance of non-radiative recombination centers, probably Zr3+. Their number decrease after annealing at 900-1000°C due to phase transformation from tetagonal to monoclinc as well as the appearance of additional green band can be the reason of consequence PL intensity increase.
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