| 氟锆酸盐光纤玻璃中的析晶和分相现象 |
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| 引用本文： | 李瑞华 陈金庆. 氟锆酸盐光纤玻璃中的析晶和分相现象[J]. 光学学报, 1990, 10(2): 09-113 |
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| 作者姓名： | 李瑞华 陈金庆 |
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| 作者单位： | 中国科学院上海光学精密机械研究所，中国科学院上海光学精密机械研究所，浙江大学材料系 杭州 |
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| 摘 要： | 氟化物光纤玻璃中的夹杂物,分相颗粒和微晶颗粒等缺陷,造成光纤的散射损失,影响了实际制备工作.本文利用大视场光学显微镜,X射线衍射,透射电子显微镜和差热分析,研究了ZBLA氟化物玻璃中的分相和析晶现象,观察到了以成核生长机理进行的分相颗粒,析晶颗粒的成分是β-BaF_2·ZrF_4和α-BaF_2·2ZrF_4,通过DTA分析确定了这些相的析晶活化能.
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| 关 键 词： | 氟锆酸盐 玻璃 析晶 分相 光纤 |
| 收稿时间： | 1989-07-14 |
Phase separation and crystallization in fluorozirconate glasses |
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| LI BUIHUA GAN FUXI. Phase separation and crystallization in fluorozirconate glasses[J]. Acta Optica Sinica, 1990, 10(2): 09-113 |
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| Authors: | LI BUIHUA GAN FUXI |
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| Abstract: | Optical waveguide fluoride glasses face a number of difficult problems despite their potential for ultra-low loss. One of the most serious is scattering loss from defects such as inclusions, phase separation particles and crystallites. By means of a Leitz optical microscope, X-ray diffraction, transmission electron microscope (TEM) and differential thermal analysis (DTA), we have investigated the phase separation and crystallization phenomena in ZrF4-BaF2-LaFs-AlF3 fluoride glasses. Phase separated particles, which formed via the nucleation and growth mechanism, were observed in the glass. The crystallites in the glass are confirmed to be beta-BaF2·ZrF4 and α-BaF2·2ZrF4. The activation energies of crystallization of these phases were determined by DTA. |
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| Keywords: | fluoroziroonate glasses orystallization of glass phase separation. |
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