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硅酸盐玻璃的风化
作者:王承遇 陶瑛 
单位:大连轻工业学院玻璃及无机新材料研究所 大连轻工业学院玻璃及无机新材料研究所 大连116001  大连116001 
关键词:硅酸盐玻璃  耐风化性  风化环境  风化产物  风化机理 
分类号:TQ171
出版年,卷(期):页码:2003,31(1):78-85
DOI:
摘要:
综述影响浮法玻璃、压延玻璃、光学玻璃、晶质玻璃和器皿玻璃的耐风化性因素 ,风化产物的形貌和风化过程。导出了玻璃表面风化析碱量和环境条件如温度、湿度和时间的关系 :玻璃样品的析碱量随风化温度、湿度和时间而增加。风化产物的形貌和成分用SEM ,WDS ,EPMA和XPS来检测。结果表明 :钠钙硅酸盐玻璃风化表面产物主要为钠和钙的碳酸盐。如玻璃发生分相 ,玻璃的耐风化性不仅与玻璃成分有关 ,还与分相形貌有关。富硅滴状结构易风化 ,风化程度随富硅相液滴的数量而增加。在相同条件下 ,富硅相的连通结构降低玻璃的风化程度。还阐述了玻璃风化机理及如何防止风化的方法 ,并对改善玻璃耐风化性指出了研究方向
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Some factors affecting weatherability, morphology of weathered products and weathering process of float glass, rolled glass, optical glass, crystal glass and glassware are reviewed. The empirical relationships between the amount of alkali extracted on weathering glass surface and the environmental condition such as temperature, humidity and time for the silicate glasses were derived. The amount of alkali extracted increases with increasing weathering temperature, humidity and time for the glass samples. The morphologies and contents of weathered products were identified by SEM, WDS, EPMA and XPS. The results indicate that the reaction products on the weathered surface of soda-lime silicate glasses are mainly sodium and calcium mixed carbonate. The weatherability of glass depends not only on composition but also on the morphology of phase separation if this glass has phase_separation. The droplets of silica_rich phase are more liable to weathering, and the weathering increases with the volume of the discrete droplets of silica_rich phase. But the weathering degree of the glass with the connected structure of the silica_rich phase will reduce under the same condition. The mechanism of the weatherability of glass and the preventive methods of glass weathering are expatiated. Moreover, the future research direction for improved weatherability of glass is pointed out.
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