摘要
一、前言 化学气相沉积法(CVD)生产的石英玻璃纯度高,使紫外透过性能改善,但它的水含量(OH^-)很高,对玻璃的透红外性能、光学均匀性、粘度、析晶性能等一系列性质影响很大。解决石英玻璃脱水可以采用干燥气流加热脱水、真空除水,但费时很长,效果不好。在生产过程中用无氢火焰或在氯气氛沉积、熔融,由于需要辅助加热等原因亦未普遍采用。近年来用含F、Cl等卤素的气、液态化合物对石英玻璃、石英粉末。
The effects of temperature, vapour carrier, duration and thermal history of specimens have been examined in dehydration of CVD silica glass by chlorine sulfoxide SOCl2. IE spectra of the silica glass in the range of 600-14000cm-2 and their variation after the dehydration process have been measured.The results indicate that the chemical dehydration is superior to the thermal dehydration and a properly higher temperature, neutral atmosphere and a chilled specimen are adaptable. The structural state of water in the silica glass is discussed in terms of IR spectroscopy. It is concluded that the main form of water dehydrated from silica glass is in hydroxyl OH-. No evidence of existing the molecular water in glass is provided by the absorption peak at 2350 and 1635 cm-1.
出处
《玻璃与搪瓷》
CAS
北大核心
1989年第3期6-11,27,共7页
Glass & Enamel
