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- W2101016432 endingPage "1666" @default.
- W2101016432 startingPage "1654" @default.
- W2101016432 abstract "CaWO4:Eu3+ microcrystals (with 0, 1, 2 and 4 mol% Eu3+) were synthesized by a co-precipitation (CP) method and grown in a microwave-assisted hydrothermal (MAH) system at 130 °C for 30 min. X-ray diffraction (XRD), Rietveld refinement, X-ray absorption near edge spectroscopy (XANES), Fourier-transform Raman (FT-Raman) and Fourier-transform infrared (FT-IR) spectroscopy indicated that all of the microcrystals have a scheelite-type tetragonal structure without deleterious phases. Structural refinement data were employed to model the [CaO8], [EuO8] and [WO4] clusters. XANES spectra confirmed that the presence of deltahedral [EuO8] clusters promotes small distortions of neighbouring tetrahedral [WO4] clusters in a global tetragonal lattice. Field emission scanning electron microcopy (FE-SEM) images revealed that the replacement of Ca2+ by Eu3+ ions changed the particles' shapes, resulting in the different morphologies of the microcrystals. UV-vis diffuse reflectance spectra indicated a reduction in the optical band gap with the replacement of Ca2+ by Eu3+ ions. The photoluminescence (PL) properties of the Eu3+ ions in CaWO4 were studied as well as the chromaticity coordinates and lifetimes of these compounds." @default.
- W2101016432 created "2016-06-24" @default.
- W2101016432 creator A5000896619 @default.
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- W2101016432 creator A5079897612 @default.
- W2101016432 creator A5085369862 @default.
- W2101016432 creator A5091426725 @default.
- W2101016432 date "2015-01-01" @default.
- W2101016432 modified "2023-10-14" @default.
- W2101016432 title "Rietveld refinement, cluster modelling, growth mechanism and photoluminescence properties of CaWO<sub>4</sub>:Eu<sup>3+</sup>microcrystals" @default.
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