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Preparation and Upconversion Luminescence of Nd3+/Yb3+ Co-doped La2O3-TiO2-ZrO2 Glass-ceramics

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Author(s): ZHANG Ming-Hui, YU Jian-Ding, PAN Xiu-Hong, CHENG Yu-Xing, LIU Yan

Journal: Journal of Inorganic Materials
ISSN 1000-324X

Volume: 28;
Issue: 8;
Start page: 896;
Date: 2013;
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Keywords: glass-ceramics; aerodynamic levitation method; heat treatment; upconversion luminescence

ABSTRACT
Nd3+/Yb3+ co-doped La2O3-TiO2-ZrO2 glass-ceramic samples were prepared by heat treatment of precursor glasses fabricated via aerodynamic levitation method. The thermal stability of the precursor glass was studied by DTA. The glass-ceramic samples were characterized by photoluminescence spectra, TEM and EDS. The effects of heat treatment on the upconversion luminescence were studied. The DTA curve shows that the glass transition temperature and the onset temperature of crystallization are 799¡æ and 880¡æ, respectively. Five emission bands centered at 497, 523, 545, 603 and 657 nm are obtained at the excitation of 980 nm laser. The emission intensity can be increased by heat treatment. The glass-ceramic samples heat-treated at 880¡æ for 50 min perform the strongest upconversion luminescence with intensity (at 545 nm) as 11 times high as that of the precursor glasses, which can be ascribed to the dense columnar crystals embedded in the glass matrix and the enrichment of Nd3+ ions in the crystals.

Tango Jona
Tangokurs Rapperswil-Jona

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