合成石英玻璃中的羟基效应：热力学、紫外透过和结构的影响

doi:10.16552/j.cnki.issn1001-1625.2025.1129

摘要/Abstract

摘要：

羟基作为石英玻璃制备与服役过程中普遍存在的非本征组分，其浓度对石英玻璃的性能具有重要影响。本文以商用JGS1（高羟基浓度）与JGS3（低羟基浓度）高纯合成石英玻璃为研究对象，利用差示扫描量热法、变温模量测试仪、拉曼光谱及真空紫外光谱等手段，系统探究了羟基对石英玻璃结构和宏观性能的影响规律。结果表明：羟基的引入导致石英玻璃的玻璃化转变温度降低了64 K，且等压热容升高；当温度为300~1 300 K时，两类样品均表现出反常的模量升高行为，JGS1的弹性模量在300~1 300 K始终低于JGS3；拉曼光谱与真空紫外光谱表明，JGS1的三元环结构较少，且羟基的引入有效修复了缺氧缺陷，消除了163 nm处的吸收峰，导致紫外截止边蓝移了7 nm（从172 nm移至165 nm）。本工作阐明了羟基对石英玻璃热力学性能和光学性能的影响，为高性能石英玻璃的成分设计提供了科学依据。

关键词: 石英玻璃, 羟基, 化学致弱, 结构弛豫, 真空紫外透过

Abstract:

Hydroxyl groups， as ubiquitous extrinsic species present during preparation and service， significantly influence the comprehensive properties of silica glass. In this study， commercial JGS1 （high-hydroxyl concentration） and JGS3 （low-hydroxyl concentration） high-purity synthetic silica glass were selected to systematically investigate the effects of hydroxyls on material properties using differential scanning calorimetry （DSC）， temperature-dependent modulus testing， Raman spectroscopy， and vacuum ultraviolet spectroscopy. The results demonstrate that the hydroxyl incorporation leads to a 64 K reduction in the glass transition temperature and an increase in the isobaric heat capacity. In the temperature range of 300~1 300 K， both samples exhibit anomalous modulus hardening behavior， and the elastic modulus of JGS1 remains consistently lower than that of JGS3. Raman and vacuum ultraviolet spectral analyses indicate that JGS1 possesses fewer three-membered ring structures， and the introduction of hydroxyls effectively repairs oxygen-deficient defects， eliminating the absorption peak at 163 nm and causing a 7 nm blue shift in the ultraviolet cut off edge （from 172 nm to 165 nm）. This work elucidates the impact of hydroxyls on the thermomechanical and optical properties of silica glasses， providing a scientific basis for the compositional design of high-performance silica glasses.

Key words: silica glass, hydroxyl, chemical weakening, structural relaxation, vacuum ultraviolet transmittance

中图分类号:

TQ171.73

程云涛, 黄洺钧, 郭超慧, 乔昂, 陶海征. 合成石英玻璃中的羟基效应：热力学、紫外透过和结构的影响[J]. 硅酸盐通报, 2026, 45(3): 781-786.

CHENG Yuntao, HUANG Mingjun, GUO Chaohui, QIAO Ang, TAO Haizheng. Hydroxyl Effects in Synthetic Silica Glass: Influence of Thermodynamics, Ultraviolet Transmittance, and Structure[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(3): 781-786.

图/表 4

图1 不同羟基含量石英玻璃的Cp 曲线

Fig.1 Cp curves of silica glass with different hydroxyl concentrations

图2 不同羟基浓度石英玻璃模量的温度依赖曲线

Fig.2 Temperature dependence of modulus for silica glass with different hydroxyl concentrations

图3 不同羟基含量的石英玻璃的拉曼光谱

Fig.3 Raman spectrum of silica glass with different hydroxyl concentrations

图4 不同羟基含量的石英玻璃的真空紫外透过光谱

Fig.4 Vacuum ultraviolet transmittance spectra of silica glass with different hydroxyl concentrations

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