Luminescence Properties of Barium - Gadolinium-Titanate Ceramics Doped with Rare-Earth Ions (eu3+ and Tb3+)

Barium-gadolinium-titanate (BaGd2Ti4O12) powder ceramics doped with rare-earth ions (Eu3+ and Tb3+) were synthesized by a solid-state reaction method. From the X-ray diffraction spectrum, it was observed that Eu3+ and Tb3+: BaGd2Ti4O12 powder ceramics are crystallized in the form of an orthorhombic structure. Scanning electron microscopy image shows that the particles are agglomerated and the particle size is about 200 nm. Eu3+- and Tb3+-doped BaGd2Ti4O12 powder ceramics were examined by energy dispersive X-ray analysis, Fourier transform infrared spectroscopy, photoluminescence and thermoluminescence (TL) spectra. Emission spectra of Eu3+-doped BaGd2Ti4O12 powder ceramics showed bright red emission at 613 nm (D-5(0) -> F-7(2)) with an excitation wavelength lambda(exci) = 408 nm (F-7(0) -> D-5(3)) and Tb3+: BaGd2Ti4O12 ceramic powder has shown green emission at 534 nm (D-5(4) -> F-7(5)) with an excitation wavelength lambda(exci) = 331 nm ((F-7(6) -> D-5(1)). TL spectra show that Eu3+ and Tb3+ ions affect TL sensitivity. Copyright (C) 2014 John Wiley & Sons, Ltd.