Abstract
A novel fabrication of Y2O3:Tm,Yb translucent ceramics by sintering method using synthetic YF3:Tm,Yb microtube powders was reported for the first time. The experimental results showed that the full dense microstructure could be obtained with grain size of about 2 μm. The obtained Y2O3:Tm,Yb ceramics had less pores and high optical transparency. By using a 980 nm diode laser as the pumping source, the Y2O3:Tm,Yb ceramics gave intense blue and red upconversion luminescence emissions, which were ascribed to the radiative transitions of 1G4→3H6,1G4→3F4 and 3F2,3 → 3H6 of Tm3+ ions, respectively. The dependence of upconversion emission intensity on the excitation power was examined, and the possible upconversion mechanisms had been proposed accordingly.
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