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Effect of Chemical Composition and Dealkalization on Weathering Durability of Commercail Soda-Lime-Silicate Glasses

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Effect of Chemical Composition and Dealkalization on Weathering Durability of Commercail Soda-Lime-Silicate Glasses
Nuntawan Pongput,1,2 Sirithan Jiemsirilers,1,2,* Tepiwan Jitwatcharakomol3,*
1 Research Unit of Advanced Ceramics, Department of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
2 National Center for Petroleum, Petrochemical and Advanced Material, Chulalongkorn University, Bangkok 10330, Thailand
3 Department of Science Service, Ministry of science and Technology
Bangkok 10400, Thailand
*email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , This e-mail address is being protected from spambots. You need JavaScript enabled to view it
Abstract: Generally soda-lime silicate glasses are weathered in the atmospheric environment especially in the rainy season of Thailand. In this study, the glass samples were kept in weathering chamber for controlling a cycling condition of 60 % and 80 % relative humidity and a cycling temperature of 20 °C and 32 °C. The weathered glass was visually investigated by difference light intensity, optical microscopy, and by Scanning Electron Microscopy (SEM). The surfaces mechanical properties were evaluated by Vickers hardness. The reformulation by adding Zr and Zn in the glass batch and surface treatment by NaHSO4 as sources of sulfur dioxide gas showed the increase of hydrolytic resistance and surface hardness. The reformulated glass and surface treatment implemented to lower amount of defects and slower the weathering process. After 28 days, the amount of haze defects decreased, comparing with ordinary glass.
Last Updated ( Tuesday, 30 June 2015 16:36 )  

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