Abstract
AbstractThermoluminescence (TL) and x-ray excited fluorescence of zirconia (ZrO2) doped with impurities of Yb2O3 and Lu2O3 have been investigated. The experimental results from XRD show that the undoped ZrO2 sample has more composition of monoclinic phase than the doped Yb2O3 and doped Lu2O3 in ZrO2 samples. All the samples have the main TL peak at 105℃ and small TL peaks at around 195℃, when they were irradiated by the UV and x-ray. But the doped zirconia samples have the obvious TL peak at 145℃.However, from the PL, a wide emission band extending from 400 to 600 nm was observed, and the two maximum peaks appeared at around 460 and 510 nm not only for the undoped ZrO2 but also for the doped ZrO2.For studying the x-ray absorption near Zr LⅢ-edge in ZrO2 sample, by comparing the fluorescence with thermoluminescence, we observed the fluorescence was increased abruptly, but the thermoluminescence was decreased near the Zr LⅢ-edge. Which could be explained that the fluorescence and phosphorescence were competitive when the x-ray absorption near the Zr LⅢ-edge.