Waxler Roy M, Cleek G W
Institute for Materials Research, National Bureau of Standards, Washington, D.C. 20234.
J Res Natl Bur Stand A Phys Chem. 1973 Nov-Dec;77A(6):755-763. doi: 10.6028/jres.077A.046.
The change in refractive index with temperature has been determined for some oxide glasses from about -200 to 700 °C. The change in refractive index with applied hydrostatic pressure has been determined at room temperature from a pressure of 10 to 10 Pa. All measurements were made using the yellow spectral line of helium. A calcium aluminate glass, an aluminum magnesium phosphate glass, a binary barium borate glass and a multicomponent germanate glass were studied, as were four commercial specimens of fused silica. From the data at room temperature, it has been possible to calculate the change in electronic polarizability with temperature at constant volume. This parameter has been found to be very high for the glasses as compared to crystals, and this agrees with the results of earlier research on silica-based optical glasses. Furthermore, over the entire temperature range, the change of refractive index with temperature is shown to be due predominantly to the temperature dependence at constant volume of the electronic polarizability. The relevance of the data to the molecular scattering of light in glasses is discussed.
已测定了一些氧化物玻璃在约-200至700°C温度范围内折射率随温度的变化。在室温下，从10至10 Pa的压力范围内测定了折射率随外加静水压力的变化。所有测量均使用氦的黄色谱线进行。研究了一种铝酸钙玻璃、一种铝镁磷酸盐玻璃、一种二元硼酸钡玻璃和一种多组分锗酸盐玻璃，以及四种熔融石英商业样品。根据室温下的数据，已能够计算出在恒定体积下电子极化率随温度的变化。已发现该参数对于玻璃而言与晶体相比非常高，这与早期对硅基光学玻璃的研究结果一致。此外，在整个温度范围内，折射率随温度的变化主要归因于电子极化率在恒定体积下对温度的依赖性。讨论了这些数据与玻璃中光的分子散射的相关性。
