High hardnesses of Tm3 -doped La2O3-Al2O3 luminescent glasses fabricated by containerless solidification
High hardnesses of Tm3 -doped La2O3-Al2O3 luminescent glasses fabricated by containerless solidification
复制标题
无容器凝固制备高硬度Tm3掺杂La2O3-Al2O3发光玻璃
DOI：
10.1016/j.jnoncrysol.2019.119599
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发表时间：
2019
影响因子：
3.5
通讯作者：
Qi Xiwei
中科院分区：
文献类型：
--
作者：
Zhang Xiaoyan;Yang Weicheng;Zhang Jinrong;Li Jinsheng;Jiang Luhong;Qi Xiwei
采用无容器法成功制备了一系列无色透明的(28-x)La2O3-72Al2O3:xTm3+(x=0,1,1.5,2,3)发光玻璃。研究了Tm3+取代对La2O3-Al2O3玻璃物理、热学、光学和光致发光性能的影响。 X 射线衍射证实了所制备的玻璃的无定形性质。在 354nm 激发下，La2O3-Al2O3:Tm3+ 玻璃在 457nm 处发出蓝色发光，对应于 Tm3+ 的 1D2→3F4 跃迁。这些玻璃表现出高维氏硬度（7.2–8.8GPa）和出色的热稳定性（Tg：840–851°C），并且随着 Tm3+ 含量的增加而增强。它们还在 220nm 至 8.9μm 的宽窗口内表现出高透射率。总之，Tm2O3 替代 La2O3 提高了 La2O3-Al2O3 玻璃的维氏硬度、热稳定性和透射率窗口，使其在可见光至红外区域的光学器件中具有潜在的应用前景。
A series of colorless and transparent (28-x)La2O3-72Al2O3:xTm3+(x= 0, 1, 1.5, 2, 3) luminescent glasses were successfully prepared by the containerless method. The effects of Tm3+substitution on the physical, thermal, optical and photoluminescence properties of La2O3-Al2O3glasses were investigated. X-ray diffraction confirmed the amorphous natures of the as-prepared glasses. Excitated at 354 nm, La2O3-Al2O3:Tm3+glasses emitted blue luminescence at 457 nm, corresponding to the1D2→3F4transition of Tm3+. These glasses showed high Vicker's hardnesses (7.2–8.8 GPa), and excellent thermal stabilities (Tg: 840–851 °C), which were both augmented with increasing content of Tm3+. They also exhibited high transmittances in a wide window ranging from 220 nm to 8.9 μm. In conclusion, the substitution of Tm2O3for La2O3increased the Vicker's hardness, thermal stability and transmittance window of La2O3-Al2O3glasses, allowing potential applications to optical devices in the visible to infrared region.