Yttria-aluminoborate (YAB) glasses have been proved to be a suitable matrix for rare earth ions. Within the compositions available in the glass-forming region of the Y2O3-Al2O3-B2O3 system, an interesting solution for optical materials can be found for composition with molar ratios close to that of YAl3(BO3)4. In YAB crystals this composition leads to a stable polymorph, isostructural to natural huntite (Mg3Ca(CO3)4) crystal, which has been extensively investigated for the realization of active optical material. In the case of YAB glasses, it has been proved that it is possible to obtain amorphous materials where the randomly distributed units share common features with the huntite-like structure. These glasses have the unusual property of ensuring a minimal distance between Ln ions. As a result, the concentration quenching effects drastically diminishes even at concentration of 30x1020 Ln at/cm3 [2] making these glasses the ideal hosts for rare earth doped optical materials [3]. Here I will present the characterization of radio- and photoluminescence properties of YAB glasses with general huntite-like composition - 10Y2O3:30Al2O3:60B2O3 - and with Y ions substituted by Ce, Tb and Dy ions. Glasses were prepared by melt-quenching method. The optical characterization shows strong photo- and radio- luminescence response for all investigated samples. Time resolved photoluminescence analysis demonstrates that Ce emission is not compromised even at doping levels as high as 9 % mol. More interestingly, for low doping level, optical activity of Ce ions is compatible with a Ce location in positions with trigonal prismatic geometry as occurs in huntite-like single crystals. In addition, the optimized co-doped Ce/Tb sample has a radioluminescence efficiency comparable to bismuth germanate (Bi4Ge3O12) crystals.

Lorenzi, R., Ziaytdinova, M., Jarý, V., Paleari, A., Sigaev, V., Nikl, M., et al. (2018). Radioluminescence of yttria-aluminoborate glasses with huntite-like composition. In Luminescent Detectors and Transformers of Ionizing Radiation Book of Abstracts (pp.60-60).

Radioluminescence of yttria-aluminoborate glasses with huntite-like composition

Lorenzi, R
;
Paleari, A;Fasoli, M;
2018

Abstract

Yttria-aluminoborate (YAB) glasses have been proved to be a suitable matrix for rare earth ions. Within the compositions available in the glass-forming region of the Y2O3-Al2O3-B2O3 system, an interesting solution for optical materials can be found for composition with molar ratios close to that of YAl3(BO3)4. In YAB crystals this composition leads to a stable polymorph, isostructural to natural huntite (Mg3Ca(CO3)4) crystal, which has been extensively investigated for the realization of active optical material. In the case of YAB glasses, it has been proved that it is possible to obtain amorphous materials where the randomly distributed units share common features with the huntite-like structure. These glasses have the unusual property of ensuring a minimal distance between Ln ions. As a result, the concentration quenching effects drastically diminishes even at concentration of 30x1020 Ln at/cm3 [2] making these glasses the ideal hosts for rare earth doped optical materials [3]. Here I will present the characterization of radio- and photoluminescence properties of YAB glasses with general huntite-like composition - 10Y2O3:30Al2O3:60B2O3 - and with Y ions substituted by Ce, Tb and Dy ions. Glasses were prepared by melt-quenching method. The optical characterization shows strong photo- and radio- luminescence response for all investigated samples. Time resolved photoluminescence analysis demonstrates that Ce emission is not compromised even at doping levels as high as 9 % mol. More interestingly, for low doping level, optical activity of Ce ions is compatible with a Ce location in positions with trigonal prismatic geometry as occurs in huntite-like single crystals. In addition, the optimized co-doped Ce/Tb sample has a radioluminescence efficiency comparable to bismuth germanate (Bi4Ge3O12) crystals.
Si
abstract + slide
Glasses, Photoluminescence,Radioluminescence, Energy transfer, Fluorescence
English
LUMDETR 2018 - International Conference on Luminescent Detectors and Transformers of Ionizing Radiation
978-80-01-06479-5
Lorenzi, R., Ziaytdinova, M., Jarý, V., Paleari, A., Sigaev, V., Nikl, M., et al. (2018). Radioluminescence of yttria-aluminoborate glasses with huntite-like composition. In Luminescent Detectors and Transformers of Ionizing Radiation Book of Abstracts (pp.60-60).
Lorenzi, R; Ziaytdinova, M; Jarý, V; Paleari, A; Sigaev, V; Nikl, M; Fasoli, M; Golubev, N
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/214151
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