how did glass is prepared?
Answers
Answer:
Believe it or not, glass is made from liquid sand. You can make glass by heating ordinary sand (which is mostly made of silicon dioxide) until it melts and turns into a liquid. You won't find that happening on your local beach: sand melts at the incredibly high temperature of 1700°C (3090°F).
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Answer:
Most glass is silica… you know, sand. Glass is typically made of several elements.
Sodium (Na) as sodium oxide (Na2O)
Calcium (Ca) as calcium oxide (CaO)
Lead (Pb) as lead oxide (PbO)
Potassium (K) as potassium oxide (K2O)
When you heat it very high, it turns to a liquid. You can then treat it in a variety of ways. You can float it on a bed of mercury to create “float” glass, which is very smooth and even thickness. You can pour it into a mold and create bottles, glasses, and many other shapes. You can stick a glob of it on the end of a hollow stick, and blow it into a variety of shapes, or put a mold around it and blow it into jars, glassware, and many other shapes.
You can add other materials to the liquid glass and change the strength, color, and other characteristics of the glass.
What most people don’t understand is that glass, as we know it, is not a solid. Oh, sure, if you tap it, it seems solid, but it isn’t. Instead, it is a VERY slow liquid. If you look at very old buildings with glass windows, you see that the glass has become very thin at the top, and thicker at the bottom. And if you wait long enough, it will all flow to the bottom.