Structural Elucidation of Eu(III)-Doped BaTiO3 Ceramics
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Structural Elucidation of Eu(III)-Doped BaTiO3 CeramicsAutoría
Tutor/Supervisor; Universidad.Departamento
Beltrán Mir, Héctor; Universitat Jaume I. Departament de Química Inorgànica i OrgànicaFecha de publicación
2018-07Editor
Universitat Jaume IResumen
BaTiO3 ceramics doped with Eu(III) were prepared via sol-gel synthesis with a Eu(III)
content between 0 – 10 mol%. The nominal compositions of the prepared compounds were:
(Ba1-3xEu2x)TiO3 and Ba(Ti1-xEux)O3-x/2, ... [+]
BaTiO3 ceramics doped with Eu(III) were prepared via sol-gel synthesis with a Eu(III)
content between 0 – 10 mol%. The nominal compositions of the prepared compounds were:
(Ba1-3xEu2x)TiO3 and Ba(Ti1-xEux)O3-x/2, where two possible mechanisms of substitution are
addressed. The environment of Eu(III) was studied from X-ray diffraction (XRD) data,
scanning electronic microscopy (SEM), energy dispersive analysis of X-rays (EDX), and
connecting both the optical properties (excitation, emission spectra, and decay curves) and
the electrical properties (permittivity and impedance spectroscopy measurements).
Regardless of the nominal compositions, the solubility limit of Eu(III) in the synthesised
materials was found to be 2 – 3 mol%. Results were consistent with the occupation of Ba
site until 2 mol% of Eu is reached in both mechanisms. It was also found for a 3 mol% in
the Ba(Ti1-xEux)O3-x/2 mechanism that Eu occupies both Ba and Ti sites. Therefore, the
combination of optical and electrical properties has led to a more accurately elucidation of
Eu(III) in BaTiO3 ceramics. [-]
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Treball Final de Grau en Química. Codi: QU0943. Curs acadèmic: 2017/2018
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