Fabrication of transparent cerium-doped lutetium aluminum garnet (LuAG:Ce) ceramics by a solid-state reaction method

Polycrystalline, transparent LuAG:Ce ceramics were fabricated by a solid-state reaction method using high-purity Lu2O3, Al2O3 and CeO2 powders. The mixed powder compacts were sintered at 1770 degrees C for 10 h under vacuum and annealed at 1450 degrees C for 20 h in air. The transmittance in the visible light region reaches 70%. The emission spectra at 470-650 nm wavelengths are consistent with that of LuAG:Ce single crystals, and satisfy the property requirements of a scintillator.