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Fluorine losses in Er3+ oxyfluoride phosphate glasses and glass-ceramics
Journal of Alloys and Compounds ( IF 4.650 ) Pub Date : 2019-05-15 , DOI: 10.1016/j.jallcom.2019.05.151
A. Szczodra,A. Mardoukhi,M. Hokka,N.G. Boetti,L. Petit

Er3+ doped phosphate glasses with the composition 75NaPO3-25CaF2 (mol%) were prepared at different melting temperatures to demonstrate the importance to quantify the fluorine content when preparing oxyfluoride glasses. Indeed, increasing the melting temperature from 900 to 1000 °C leads to a small reduction in the fluorine content from 9.4 at % to 8.8 at % as quantified using EPMA. Whereas this loss of fluorine can be suspected from small changes in the thermal properties of the glass, it increases significantly the glass crystallization tendency in this glass system. This means that a heat treatment of the as-prepared glass should be performed when evaporation of fluorine during the glass melting is suspected. Sample preparation for the characterization of the spectroscopic properties of the glasses is discussed here as well; bulk glasses should be used when measuring the spectroscopic properties of oxyfluoride glasses, which are known to be hygroscopic. It is shown, in this work, that a heat treatment of the glass within the investigated glass system leads to transparent glass-ceramics with volume precipitation of Er3+ doped CaF2 crystals with strong upconversion.



中文翻译:

Er 3+氟氧化磷玻璃和玻璃陶瓷中的氟损失

掺Er 3+的磷酸盐玻璃,其成分为75NaPO 3- 25CaF 2在不同的熔融温度下制备了摩尔百分数(mol%),以证明在制备氟氧化物玻璃时量化氟含量的重要性。实际上,将熔融温度从900℃提高到1000℃会导致氟含量从9.4 at%降至8.8 at%的少量降低,如使用EPMA所定量的。尽管可以从玻璃的热性能的微小变化怀疑氟的这种损失,但它显着增加了该玻璃体系中玻璃的结晶趋势。这意味着当怀疑玻璃熔融过程中氟的蒸发时,应对所制备的玻璃进行热处理。本文还讨论了用于表征玻璃光谱特性的样品制备方法。在测量已知具有吸湿性的氟氧化物玻璃的光谱特性时,应使用大块玻璃。在这项工作中表明,在所研究的玻璃系统中对玻璃进行热处理会导致透明的玻璃陶瓷,其中有大量的Er析出。3+掺杂的CaF 2晶体具有较强的上转换。

更新日期:2019-05-15
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