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Nanoparticles size effects in thermoluminescence of oxyfluoride glass-ceramics containing Sm3+-doped CaF2 nanocrystals

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Abstract

Oxyfluoride glass-ceramic in the system SiO2–Al2O3–CaF2–SmF3 containing Sm3+-doped CaF2 nanocrystals in the range from 15 to 150 nm size were produced by using the controlled ceramization of the precursor glass. The incorporation of the Sm3+-dopant ion in the glass ceramic creates new electron-trapping centers and thermoluminescence (TL) method has been used in order to trace their evolution during glass ceramization. The 370 °C TL peak observed in precursor glass has been assigned to the recombination of the electrons released from the Sm2+-traps in the amorphous glass network. In the glass-ceramic sample containing nanocrystals with about 15 nm size the new weak TL peaks at 270, 290, and 310 °C were attributed to the recombination of the electrons released from the Sm2+-traps located mainly at the surface of the CaF2 nanocrystals. In the glass-ceramic sample containing nanocrystals with about 150 nm size, the new TL peaks at 232, 270, and 302 °C size have been assigned to the recombination of the electrons released from the Sm2+-traps located inside the CaF2 nanocrystals.

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Acknowledgments

The author gratefully acknowledge the Romanian Research Ministry (“Core Program no. PN09-450102”) for the financial support of this work.

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  1. National Institute of Materials Physics, P.O. Box MG-7, 77125, Magurele-Bucharest, Romania

    M. Secu

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  1. M. Secu
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Secu, M. Nanoparticles size effects in thermoluminescence of oxyfluoride glass-ceramics containing Sm3+-doped CaF2 nanocrystals. J Nanopart Res 13, 2727–2732 (2011). https://doi.org/10.1007/s11051-010-0181-2

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  • DOI: https://doi.org/10.1007/s11051-010-0181-2

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