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Gd 3+ , Dy 3+ , Tb 3+ and Lu 3+ doped BaTiO 3-based phosphors were synthesized with modified solidstate technique at 1000 • C. The optimization of reaction conditions were carried out by thermogravimetry and differential thermal analysis methods (DTA/TG). The reaction products obtained in an air atmosphere were characterized by X-ray powder diffraction (XRD). Surface and elemental analyses were performed by using an SEM instrument. The excitation and emission spectra were recorded by photoluminescence spectrophotometer (PL). The thermoluminescence (TL) properties of BaTiO 3 samples doped with Gd 3+ , Dy 3+ , Tb 3+ and Lu 3+ were investigated.

This paper reports Gd 3+ , Tb 3+ and Lu 3+ doped MTiO 3 (M = Mg and Sr)-based phosphors which were synthesized by the conventional solid-state reaction method, their crystal structures and luminescence properties were investigated. X-ray diffraction patterns (XRD) showed that phosphors sintered at 1000 • C for 2 h were the pure SrTiO 3 and MgTiO 3 phases. The optimization of reaction conditions was carried out by thermogravimetry and differential thermal analysis (DTA/TG) methods. Surface and elemental analyses were performed by using SEM instrument. The excitation and emission spectra were recorded by a photoluminescence spectrophotometer (PL). The thermoluminescence (TL) properties of MgTiO 3 :RE (RE = Gd 3+ , Tb 3+ , Lu 3+) and SrTiO 3 :RE (RE = Gd 3+ , Tb 3+ , Lu 3+) were investigated.