Question

why the glass objects are allowed to cool from high temperature very slowly ??​

Answer 1

Hey mate ,

Cooling the glass allows the formation of a network so that the glass becomes rigid, but not crystalline. However, if glass is cooled too slowly, a large fraction of the −Si−O−Si−O− linkages reform, making the structure more closely resemble that of crystalline silicates, and the product is brittle.

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