Lopez-Iscoa Pablo, Salminen Turkka, Hakkarainen Teemu, Petit Laeticia, Janner Davide, Boetti Nadia G, Lastusaari Mika, Pugliese Diego, Paturi Petriina, Milanese Daniel
Politecnico di Torino, Dipartimento di Scienza Applicata e Tecnologia (DISAT) and INSTM UdR Torino Politecnico, Corso Duca degli Abruzzi 24, Torino 10129, Italy.
Laboratory of Photonics, Tampere University of Technology, Korkeakoulunkatu 3, 33720 Tampere, Finland.
Materials (Basel). 2017 Apr 28;10(5):473. doi: 10.3390/ma10050473.
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 Er 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 Er ions are incorporated in the precipitated crystals only in this glass ceramic.
通过熔融淬火技术并随后进行热处理制备了掺铒磷酸盐玻璃陶瓷。研究了晶化对含Al₂O₃、TiO₂和ZnO的磷酸盐玻璃的结构和发光性能的影响。通过场发射扫描电子显微镜（FE-SEM）、X射线衍射（XRD）和显微拉曼光谱对玻璃陶瓷的形态和结构性能进行了表征。此外，为了研究晶化对玻璃光谱性能的影响，测量了发光光谱和寿命值。晶体相与玻璃相之间的体积比随着热处理时间的延长而增加。XRD图谱中尖锐峰的出现证实了玻璃陶瓷的晶化，并且根据玻璃组成鉴定出了不同的晶相。发现在所有研究的玻璃中都有Sr(PO₃)₂晶体析出。从光谱性能可以看出，除了不含Al₂O₃、TiO₂和ZnO的完全晶化的玻璃陶瓷外，热处理对铒离子的位置影响不大。对这种玻璃进行热处理后还观察到寿命增加。因此，我们推测只有在这种玻璃陶瓷中铒离子才掺入到析出的晶体中。
