Structure and optical properties of transparent Er3+-doped CaF2-silica glass ceramic prepared by controllable sol-gel method
Structure and optical properties of transparent Er3+-doped CaF2-silica glass ceramic prepared by controllable sol-gel method
复制标题
可控溶胶-凝胶法制备透明Er3掺杂CaF2-二氧化硅玻璃陶瓷的结构与光学性能
DOI：
10.1016/j.ceramint.2016.03.039
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发表时间：
2016-06-01
影响因子：
5.2
通讯作者：
Zhang, Long
中科院分区：
文献类型：
--
作者：
Jiang, Yiguang;Fan, Jintai;Zhang, Long
通过在酸催化溶胶-凝胶石英玻璃中直接物理引入掺铒CaF 2纳米晶，制备了掺铒CaF 2透明石英玻璃陶瓷。研究了球磨、超声浴和搅拌等物理方法在硅溶胶中分散掺铒CaF 2纳米晶的效果。CaF 2-SiO2溶胶混合物经过凝胶化和热处理形成掺Er 3+的CaF 2-SiO2玻璃陶瓷。在600 ℃热处理10 h后，掺Er 3+的CaF 2在石英玻璃中的形貌没有发生变化。实验结果表明，球磨法制备的掺Er ~（3+）CaF_2微晶玻璃具有最好的分散性和均匀性。该微晶玻璃在可见光区的最高在线透过率可达85%。在980 nm激发下，玻璃陶瓷表现出与Er 3+：F-4（9/2）-> I-4（15/2）跃迁相对应的高效上转换发光和F-4（9/2）能级的长寿命（1.73 ms）。(C)2016 Elsevier Ltd和Techna Group S.r.l. All rights reserved.
Transparent Er3+-doped CaF2-silica glass ceramics were prepared by the direct physical introduction of Er3+ doped CaF2 nanocrystals into acid-catalyzed sol-gel silica glass. The physical methods of ball milling, ultrasonic baths, and stirring were investigated to disperse Er3+ doped CaF2 nanocrystals in the silica sols. The CaF2-silica sol mixture went through gelation and heat-treatment to form Er3+-doped CaF2-silica glass ceramics. The morphology of Er3+ doped CaF2 in silica glass did not change after heat-treatment at 600 degrees C for 10 h. The experimental results showed that Er3+ doped CaF2 in the glass ceramic prepared with the assistance of ball milling possesses the best dispersity and homogeneity. The highest in-line transmittance of the glass ceramic reached up to 85% in visible region. Glass ceramic exhibits efficient up-conversion emissions corresponding to the Er3+:F-4(9/2)-> I-4(15/2) transition and long lifetime of F-4(9/2) level (1.73 ms) under 980 nm excitation. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.