A Raman investigation of lead haloborate glasses
A Raman investigation of lead haloborate glasses
复制标题
卤硼酸铅玻璃的拉曼研究
DOI：
10.1063/1.467755
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发表时间：
1994
影响因子：
4.4
通讯作者：
S. Morgan
中科院分区：
文献类型：
--
作者：
Z. Pan;D. Henderson;S. Morgan
(65−x)PbO⋅xPbX2⋅35B2O3 系统（其中 X=F、Cl、Br 和 I）的玻璃已通过拉曼测量制成并进行了研究。分别在约 40、105 和 135 cm−1 处观察到三个具有高拉曼强度的低频带。结果发现，去偏振低频拉曼轮廓的强度在 40 cm−1 处达到峰值，并且非常高，并且强烈依赖于卤素类型和含量。我们将这种非对称低频拉曼轮廓归因于 BO3-PbO4 桥接局部结构的集体模式，并提出了一个模型来解释实验数据。我们的结果表明这些局部结构的释放与铅和卤素有关。 Cl、Br 和 I 作为非桥接阴离子进入玻璃，并按 Cl、Br 和 I 的增加顺序削弱玻璃网络的内聚力。
Glasses of the (65−x)PbO⋅xPbX2⋅35B2O3 system (where X=F, Cl, Br, and I) have been made and investigated by Raman measurements. Three low frequency bands with high Raman intensities have been observed at about 40, 105, and 135 cm−1, respectively. It is found that the intensities of the depolarized low frequency Raman contour peaked at 40 cm−1 are exceptionally high and strongly dependent on the halogen type and content. We attribute this nonsymmetric low‐frequency Raman contour to the collective modes of the BO3–PbO4 bridged local structures and propose a model to interpret the experimental data. Our results suggest that the liberation of these local structures is related to the lead as well as the halogen. Cl, Br, and I enter the glass as nonbridging anions and weaken the cohesion of the glass network in the increased order of Cl, Br, and I.