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- W2946777590 abstract "Crystallization processes of bismuth germanate glasses may be evidenced by the optical properties of Eu3+ ions, used as probes because these ions substitute the Bi3+ ions in the glass-ceramic samples. The gradual thermal annealing of these glasses induces rearranging of GeO4 tetrahedra around Bi3+ ions and transforms the red colored glasses in transparent glass-ceramic samples. The red color comes from the light scattering on GeO4 clusters and, after rearranging in Bi4Ge3O12 nanoparticles, convert the glass-ceramic samples in transparent materials. One of the most essential information is given by the phonon side bands investigations which, coupled with the Raman spectra allows the identification of Bi4Ge3O12 lattice vibration but also those of residual GeO4 tetrahedra. The measurements of the luminance and CIE circle have shown a significant increase of the light emission for the glass-ceramic samples, while the Magnetic Circular Dichroism indicate lower symmetry coordination around the Eu3+ ions in the glass sample compared with the glass-ceramic and also a change in the coordination number to the higher values." @default.
- W2946777590 created "2019-05-29" @default.
- W2946777590 creator A5061814296 @default.
- W2946777590 date "2019-09-01" @default.
- W2946777590 modified "2023-10-16" @default.
- W2946777590 title "Crystallization processes in europium-doped Bi4Ge3O12 glass materials" @default.
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- W2946777590 doi "https://doi.org/10.1016/j.jlumin.2019.05.031" @default.
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