Wenzel, John Ceramics Department, Rutgers University, Piscataway, New Jersey.
Last reviewed:August 2019
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- Glass chemistry
- Heat treatment
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A hard, amorphous, inorganic, usually transparent, brittle substance made by melting silica (SiO2) with certain basic oxides and then cooling the melt in such a manner that it not crystallize. Although glasses can be made without silica, most commercially important glasses are based on it. Materials having this ability to cool without crystallizing are relatively rare, silica being the most common example. See also: Amorphous solid
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