Crystallization and luminescence properties of various Eu 3+ content doped Al 2 O 3 prepared by sol–gel method

Eu3+ doped alumina has been prepared by sol–gel method. And the crystallization and luminescence properties of the samples were studied by DSC, XRD, Raman, and emission spectra. The structure analysis showed boehmite precipitated after drying at 90 °C, the single γ-Al2O3 formed when calcined at 500 °C, and the polycrystalline including EuAlO3 and α-Al2O3 were observed at 1150 °C. Emission spectra showed that the quenching concentration of Eu3+ ion is different after heat treatment at 90 °C, 500 °C, and 1150 °C. And for the samples with same Eu3+ content, the maximum luminescence intensity is always observed in sample calcined at 500 °C, while the minimum at 1150 °C.