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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Optical properties of fluorine-substituted zinc bismuth phosphate glasses
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Optical properties of fluorine-substituted zinc bismuth phosphate glasses

机译：氟取代磷酸锌铋玻璃的光学性质

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摘要

The effects of the substitution of fluoride ions for oxide ions on the thermal and optical properties of ternary ZnO-Bi_2O_3-P _2O_5 glass with low-P_2O_5 content (20-25 mol%) were investigated. Fluoride ions were introduced into the glass up to about 12 mol% as ZnF_2. Raman spectra indicated that fluoride ions were substituted for oxide ions connected with bismuth ions. Deformation and glass transition temperatures decreased monotonically with fluorine concentration. The absorption edge shifted toward higher energies with increasing fluorine concentration by about 0.3 eV for 12 mol% ZnF_2 substitution. The blue shift of the absorption edge is attributable to two effects. One was a blue shift of an absorption band which was observed as a peak at 4.7 eV in the reflection spectra and was attributed to the spin forbidden 6s-6p interband transition in Bi~(3+) ions. The blue shift originates from a change in electron-donating ability through anions as expected from electronegativity or optical basicity. Another is a disappearance of a shoulder at around 4.3 eV in the reflection spectra. The latter was the major reason for the large blue shift of the absorption edge energy, because the band relating to the 4.3 eV shoulder is close to the absorption edge.
机译：研究了氟离子取代氧化物离子对低P_2O_5（20-25 mol％）的三元ZnO-Bi_2O_3-P _2O_5玻璃的热学和光学性能的影响。将氟离子以至多约12mol％的ZnF 2的形式引入玻璃中。拉曼光谱表明，氟离子取代了与铋离子相连的氧化物离子。变形和玻璃化转变温度随氟浓度单调降低。对于12 mol％的ZnF_2取代，随着氟浓度增加约0.3 eV，吸收边向更高的能量移动。吸收边缘的蓝移可归因于两个效应。一个是吸收带的蓝移，该吸收带在反射光谱中以4.7 eV的峰值观察到，并且归因于Bi〜（3+）离子自旋禁止的6s-6p带间跃迁。蓝移源自负电性或光学碱度所预期的阴离子给电子能力的变化。另一个是在反射光谱中约4.3 eV处的肩部消失。后者是吸收边缘能量发生较大蓝移的主要原因，因为与4.3 eV肩峰有关的谱带接近吸收边缘。

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