Premium
Luminescence properties of barium – gadolinium–titanate ceramics doped with rare‐earth ions (Eu 3+ and Tb 3+ )
Author(s) -
Hemasundara Raju S.,
Muni Sudhakar B.,
Sudhakar Reddy B.,
Dhoble S. J.,
Thyagarajan K.,
Nageswara Raju C.
Publication year - 2014
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2633
Subject(s) - materials science , analytical chemistry (journal) , orthorhombic crystal system , gadolinium , barium , barium titanate , photoluminescence , thermoluminescence , doping , ceramic , powder diffraction , scanning electron microscope , ion , luminescence , nuclear magnetic resonance , crystal structure , chemistry , crystallography , optoelectronics , physics , organic chemistry , chromatography , metallurgy , composite material
Barium‐gadolinium‐titanate (BaGd 2 Ti 4 O 12 ) 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+ :BaGd 2 Ti 4 O 12 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 BaGd 2 Ti 4 O 12 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 BaGd 2 Ti 4 O 12 powder ceramics showed bright red emission at 613 nm ( 5 D 0 → 7 F 2 ) with an excitation wavelength λ exci = 408 nm ( 7 F 0 → 5 D 3 ) and Tb 3+ :BaGd 2 Ti 4 O 12 ceramic powder has shown green emission at 534 nm ( 5 D 4 → 7 F 5 ) with an excitation wavelength λ exci = 331 nm (( 7 F 6 → 5 D 1 ). TL spectra show that Eu 3+ and Tb 3+ ions affect TL sensitivity. Copyright © 2014 John Wiley & Sons, Ltd.