Luminescence properties of barium – gadolinium–titanate ceramics doped with rare‐earth ions (Eu³⁺ and Tb³⁺)

Abstract

Barium-gadolinium-titanate (BaGd2 Ti4 O12) powder ceramics doped with rare-earth ions (Eu(3+) and Tb(3+)) were synthesized by a solid-state reaction method. From the X-ray diffraction spectrum, it was observed that Eu(3+) and Tb(3+):BaGd2 Ti4 O12 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. Eu(3+) - and Tb(3+) -doped BaGd2 Ti4 O12 powder ceramics were examined by energy dispersive X-ray analysis, Fourier transform infrared spectroscopy, photoluminescence and thermoluminescence (TL) spectra. Emission spectra of Eu(3+)-doped BaGd2 Ti4 O12 powder ceramics showed bright red emission at 613 nm ((5)D0 →(7)F2) with an excitation wavelength λ(exci) = 408 nm ((7)F0 → (5)D3) and Tb(3+):BaGd2 Ti4 O12 ceramic powder has shown green emission at 534 nm ((5)D4 → (7)F5) with an excitation wavelength λ(exci) = 331 nm (((7)F6 → (5)D1). TL spectra show that Eu(3+) and Tb(3+) ions affect TL sensitivity.

E-tirucalli latex mediated green biogenic synthesized Dy3+ doped and Bi3+ co-doped nano perovskite lanthanum aluminum oxide: structure, morphology, luminescence and dielectric studies

“…Lanthanum Aluminates (LaAlO 3 ) are broadly used host materials when compared to other NMs. LaAlO 3 records transparency to EM waves to a wider range of frequencies, stable inorganic ceramic oxides, and shows diverse applications [10,11]. Morphology, structure particle size and its agglomeration, surface area and so on are purely dependent on the synthesis process.…”

Synthesis, Impedance and Current-Voltage Spectroscopic Characterization of Novel Gadolinium Titanate Nano Structures

“…. Crystallinity[34][35] of titanate decreases after the introduction of Gd +3 ions and also decreases the crystallite size. Incorporation of Gd +3 ions restricts the grain boundary movement and limits the growth of the crystals.…”