Abstract The effect of chloride ions on the properties of Er3+-doped fluorozirconate glass is systematically studied. We first observed a nonlinear mutation of the glass-forming abilities and fluorescence properties of glass when 1 mol% fluoride ions were replaced by chloride ions. The results differed from previous reports. In order to explain this special phenomenon, we investigated the changes of the structure and the Judd-Ofelt theory of glass before and after halogen anion substitution. The results indicate that part of the fluorozirconium octahedral network was destroyed and transformed into a chain structure due to the bridging chlorine atoms, of which the electronegativity is lower than F-. With the increase of Cl-, the glass-forming abilities gradually recovered due to the decrease of the liquid's temperature. Therefore, a non-linear mutation of the glass-forming abilities was exhibited. Furthermore, the predictor χ, the ratio between the Judd–Ofelt parameters Ω 4 and Ω 6 , and the reduction in phonon density caused a mutation on the fluorescence properties of glass, such as the intensity and lifetime. This research could provide a new reference for the anion modification of fluoride glass.

中文翻译：

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Er3+掺杂氟锆酸盐玻璃引入氯离子引起性能的非线性变化

摘要 系统研究了氯离子对Er3+掺杂氟锆酸盐玻璃性能的影响。当 1 mol% 的氟离子被氯离子取代时，我们首先观察到玻璃的玻璃形成能力和荧光特性的非线性突变。结果与之前的报告不同。为了解释这一特殊现象，我们研究了卤素阴离子取代前后玻璃的结构变化和Judd-Ofelt理论。结果表明，部分氟锆八面体网络由于桥连氯原子而被破坏并转变为链状结构，其电负性低于F-。随着Cl-的增加，由于液体温度的降低，玻璃形成能力逐渐恢复。所以，表现出玻璃形成能力的非线性突变。此外，预测因子χ、Judd-Ofelt 参数Ω 4 和Ω 6 之间的比率以及声子密度的降低导致玻璃的荧光特性（例如强度和寿命）发生突变。该研究可为氟化物玻璃的阴离子改性提供新的参考。