Synthesis, Photoluminescence and Thermoluminescence Properties of Sm~(3+) and Dy~(3+) Ions Doped Barium Gadolinium Titanate Ceramics

摘要

This article reports on the synthesis, photoluminescence and thermoluminescence properties of samarium and dysprosium ions doped barium gadolinium titanate powder ceramics. The prepared samples were characterized by X- ray diffraction spectrum and it is observed that Sm~(3+) and Dy~(3+) ions doped barium gadolinium titanate powder ceramics are orthorhombic structure. From the SEM images of Sm~(3+) andDy~(3+): BaGd_2Ti_4O_(12) ceramics, it is observed that the average grain size in the range ～200-300 nm. The elements present in the composition are confirmed by the EDAX profiles and functional groups have been identified by using Fourier Transform Infrared spectroscopy. Photoluminescence spectra of Sm~(3+): BaCd_2Ti_4O_(12) ceramics have shown strong reddish-orange emission at 598 nm (~4G_(5/2)→~6H_(7/2)) with an excitation wavelength λ_(exci) = 408 nm (~6H_(5/2)→~4F_(7/2)) and Dy~(3+): BaGd_2Ti_4O_(12) ceramics have shown yellow emission at 587 nm (~4F_(9/2)→~6H_(13/2)) with an excitation wavelength λ_(exci)i = 427 nm (~6H_(15/2)→~4G_(11/2)). Thermoluminescence (TL) nature of Sm~(3+) and Dy~(3+) ions doped BaGd_2Ti_4O_(12) ceramics has been observed with gamma ray irradiation.