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首页> 外文期刊>European Journal of Glass Science and Technology, PartB. Physics and Chemistry of Glasses >Characterization of optical glasses by Rayleigh and Mandel'shtam-Brillouin scattering and high temperature acoustic methods. Part 1. Flint glasses
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Characterization of optical glasses by Rayleigh and Mandel'shtam-Brillouin scattering and high temperature acoustic methods. Part 1. Flint glasses

机译：通过瑞利和曼德尔施塔姆-布里渊散射和高温声学方法表征光学玻璃。第1部分。火石杯

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摘要

Commercial flint glasses with compositions xR(2)O-(100-x)SiO2+(24.0 +/- 0.9), PbO(8.4 +/- 0.2)R2O-91.4 +/- 0.6)SiO2+xPbO, (10.3 +/- 0.2)R2O-(89.7 +/- 0.2)SiO2+xPbO, (12.1 +/- 0.2)R2O (87.9 +/- 0.2)SiO2+xPbO (mol%) (R=Na+K) series were studied by Rayleigh and Mandel'shtam-Brillouin scattering (RMBS) spectroscopy and acoustic methods. Landau-Placzek ratios, RL-P, and elastic moduli were determined from RMBS spectra of the glasses and compared with reference data. Composition dependencies of RL-P were discussed in terms of "freezing" concentration, density, and anisotropy fluctuations in a glass melt on cooling. Use of high temperature acoustic data allowed separation of the contributions of various fluctuations to RL-P. Selective inclusion of Pb in alkali-enriched concentration inhomogeneities of alkali silicate hosts has been verified by RMBS measurement results. It is supposed that a RMBS spectrometer might be used instead of instrumentation for measuring light scattering loss coefficients, elastic and elasto-optic parameters of commercial optical glasses.
机译：商用火石玻璃，其成分为xR（2）O-（100-x）SiO2 +（24.0 +/- 0.9），PbO（8.4 +/- 0.2）R2O-91.4 +/- 0.6）SiO2 + xPbO，（10.3 +/-通过瑞利（Rayleigh）研究了0.2）R2O-（89.7 +/- 0.2）SiO2 + xPbO，（12.1 +/- 0.2）R2O（87.9 +/- 0.2）SiO2 + xPbO（mol％）（R = Na + K）系列。 Mandel'stam-Brillouin散射（RMBS）光谱和声学方法。从眼镜的RMBS光谱确定Landau-Placzek比，RL-P和弹性模量，并将其与参考数据进行比较。根据冷却时玻璃熔体中的“冻结”浓度，密度和各向异性波动来讨论RL-P的成分依赖性。使用高温声学数据可以分离各种波动对RL-P的影响。 RMBS测量结果证实了Pb在碱金属硅酸盐基质的富碱浓度不均匀性中的选择性包容。假设可以使用RMBS光谱仪代替仪器来测量商用光学玻璃的光散射损耗系数，弹性和弹性参数。

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