高温均化对石英玻璃结构的影响

Influence of High-temperature Homogenization on the Structure of Silica Glass

为消除石英玻璃高温熔制过程中产生的结构缺陷,采用高温均化处理石英玻璃,并借助偏光显微镜、应力仪、傅里叶变换红外光谱仪测试玻璃结构。研究结果表明,高温均化过程中,石英玻璃中10 mm以上的大气泡和50μm以下的小气泡,以及尺寸较小的颗粒和条纹可基本消除;同时,均化有利于提高羟基分布的均匀性,从而提高石英玻璃结构均匀性与性能稳定性。

In order to eliminate the structural defects in silica glasses,high-temperature homogenization was adopted in this paper.By means of polarized light microscope,stress apparatus and Fourier infrared spectrum instrument,the structure of silica glasses were analyzed.The results showed that,in homogenization,the granule,small stripe and bubbles larger than ten millimeters or smaller than fifty micron could be eliminated basically.Meantime,hydroxyl distribution was more uniform,so as to improve structural homogenization and performance stability of silica glasses.