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How is silica obtained for industrial glassmaking?

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Observe how a superhydrophobic multifunctional glass surface resists fogging, glare, and self cleans — industrial glass Examining a superhydrophobic glass surface that resists fog and glare and is self-cleaning.

For industrial glassmaking, silica is primarily obtained from clean sand, which must be properly sized, cleaned, and treated to meet purity standards. Because sand naturally contains impurities like iron, which can affect the color of the final product, manufacturers often select specific sources to ensure the desired quality.12

For specialized applications requiring high-purity silica, such as premium chemical or optical glass, manufacturers may use rock crystal or high-purity quartz instead of standard sand. Additionally, the Vycor process can be used to obtain a high-silica glass (approximately 96 percent silica) by creating a sodium borosilicate melt, separating the phases, and dissolving the sodium borate-rich phase with acid to leave behind a porous silica skeleton.234