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Materials 2017, 10(5), 473; doi:10.3390/ma10050473

Effect of Partial Crystallization on the Structural and Luminescence Properties of Er3+-Doped Phosphate Glasses

1
Politecnico di Torino, Dipartimento di Scienza Applicata e Tecnologia (DISAT) and INSTM UdR Torino Politecnico, Corso Duca degli Abruzzi 24, Torino 10129, Italy
2
Laboratory of Photonics, Tampere University of Technology, Korkeakoulunkatu 3, 33720 Tampere, Finland
3
Optoelectronics Research Centre, Tampere University of Technology, Korkakoulunkatu 3, 33720 Tampere, Finland
4
nLIGHT Corporation, Sorronrinne 9, 08500 Lohja, Finland
5
Istituto Superiore Mario Boella, Via P. C. Boggio 61, 10134 Torino, Italy
6
Department of Chemistry, University of Turku, 20014 Turku, Finland
7
Turku University Centre for Materials and Surfaces (MatSurf), 20014 Turku, Finland
8
Department of Physics and Astronomy, Wihuri Physical Laboratory, University of Turku, 20014 Turku, Finland
9
IFN-CNR, CSMFO Lab., Via alla Cascata 56/C, 38123 Povo (TN), Italy
Current Address: Laboratory of Photonics, Tampere University of Technology, Korkeakoulunkatu 3, 33720 Tampere, Finland.
*
Author to whom correspondence should be addressed.
Academic Editor: Jonathan Kitchen
Received: 30 March 2017 / Revised: 19 April 2017 / Accepted: 25 April 2017 / Published: 28 April 2017
(This article belongs to the Special Issue Luminescent Materials 2017)
View Full-Text   |   Download PDF [25309 KB, uploaded 28 April 2017]   |  

Abstract

Er-doped phosphate glass ceramics were fabricated by melt-quenching technique followed by a heat treatment. The effect of the crystallization on the structural and luminescence properties of phosphate glasses containing Al2O3, TiO2, and ZnO was investigated. The morphological and structural properties of the glass ceramics were characterized by Field Emission-Scanning Electron Microscopy (FE-SEM), X-ray Diffraction (XRD), and micro-Raman spectroscopy. Additionally, the luminescence spectra and the lifetime values were measured in order to study the influence of the crystallization on the spectroscopic properties of the glasses. The volume ratio between the crystal and the glassy phases increased along with the duration of the heat treatment. The crystallization of the glass ceramics was confirmed by the presence of sharp peaks in the XRD patterns and different crystal phases were identified depending on the glass composition. Sr(PO3)2 crystals were found to precipitate in all the investigated glasses. As evidenced by the spectroscopic properties, the site of the Er3+ ions was not strongly affected by the heat treatment except for the fully crystallized glass ceramic which does not contain Al2O3, TiO2, and ZnO. An increase of the lifetime was also observed after the heat treatment of this glass. Therefore, we suspect that the Er3+ ions are incorporated in the precipitated crystals only in this glass ceramic. View Full-Text
Keywords: phosphate glass; glass ceramic; nucleation and growth; Er3+ luminescence property phosphate glass; glass ceramic; nucleation and growth; Er3+ luminescence property
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MDPI and ACS Style

Lopez-Iscoa, P.; Salminen, T.; Hakkarainen, T.; Petit, L.; Janner, D.; Boetti, N.G.; Lastusaari, M.; Pugliese, D.; Paturi, P.; Milanese, D. Effect of Partial Crystallization on the Structural and Luminescence Properties of Er3+-Doped Phosphate Glasses. Materials 2017, 10, 473.

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