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Glass becomes as hard as metal! #machine #insulator

Glass becomes as hard as metal! #machine #insulator

China Energy and Chemical Industry
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A piece of ordinary glass goes through a high temperature of several thousand degrees, then a low temperature and then back to 500 degrees. After repeated high temperature, the glass becomes as hard as metal! This is the glass insulator widely used in high-voltage transmission lines. Its production process is extremely complicated. The furnace is heated to more than 1400 degrees Celsius, and the quartz sand is melted into liquid glass. It is blown into shape at high temperature. The next most important step is cooling. If the cooling speed is not fast enough, the glass insulator cannot be strong enough.