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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
engineering
Dependence of Eu3+photoluminescence properties on structural transformations in diopside-based glass-ceramics
Journal of Alloys and Compounds, Volume 699, Year 2017
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Description
Herein, diopside based glass-ceramics (GCs) were produced by sintering of glass powder compacts at 850 °C for 300 h. A special attention was paid on understanding the influence of structural transformations upon substituting strontium for calcium on the Eu3+emission behavior. X-ray diffraction and Raman spectra showed the formation of diopside (CaMgSi2O6) in Sr-free glasses. Introduction of Sr led to the appearance of Sr-akermanite (Sr2MgSi2O7), whose formation increased continuously with increasing Sr/Ca ratio. The photoluminescence spectra exhibited intense5D0→7Fjtransitions of Eu3+ions. The intensity parameters (Ω2and Ω4) and the Eu–O ligand behavior were determined using the Judd-Ofelt (JO) theory from the emission spectra as a function of various Sr concentrations. The as obtained JO intensity parameters Ω2(5.31–5.21 pm2) and Ω4(4.89–5.84 pm2) indicated the ligand behavior of the Eu–O bonds and a high asymmetrical and covalent environment around Eu3+ions in the present host matrix. In comparison with other Eu3+-doped GCs, diopside based GCs containing high fraction of SrO exhibited adequate photoluminescence for optical lighting and display devices. © 2017 Elsevier B.V.
Authors & Co-Authors
Das, Subrata
Taiwan, Taipei
National Taiwan University
Som, S.
Taiwan, Taipei
National Taiwan University
Santos, Luís F.
Portugal, Lisbon
Centro de Quimica Estrutural
Jubéra, Véronique
France, Pessac
Institut de Chimie de la Matière Condensée de Bordeaux
Ferreira, J. M. F.
Portugal, Aveiro
Universidade de Aveiro
Statistics
Citations: 5
Authors: 5
Affiliations: 7
Identifiers
Doi:
10.1016/j.jallcom.2016.12.438
ISSN:
09258388
Research Areas
Environmental