How are the strengths produced?

Tempered glass has a strength of four times that of ordinary glass. When broken, ordinary glasses will dissolve into large pieces while the toughened glass will form tiny chips, minimizing damage.

The toughness of the phone is one of the products in the group of tempered glass, tempered glass is used in places where high safety, such as glass windows of vehicles, doors, windows on the ceiling, in the bathroom, balcony, oven.

The glass surface will be cooled faster than the inside.

According to Scientific American, the process is as follows: First, cut the glass, the glass must be cut and processed to form before firing because the strength may be reduced or the product will fail if When the glass is still grinding or grinding. After that, the glass should be checked for signs of glass breakage during heating or not.

Next , the glass begins to heat in the oven at temperatures up to 600 degrees Celsius, in industry, the standard temperature is 620 degrees Celsius. After heating, the glass plate will continue to work Cool with high capacity equipment. This process lasts only a few seconds, and a large amount of cold air is blown from the hose to the entire glass surface.

The glass surface will be cooled faster than the inside. When the inner part is cooled, it will pull the glass surface firmly, so that the inner part is still stretched and the outer surface is compressed to give the glass a strength.

Video on tempered glass process.

The glass is usually only 5 times more compressible than the compressed glass. Ordinary glass can withstand a maximum of 6000 psi (pressure per square inch). Tempered glass with a surface of more than 10,000 psi can withstand nearly 24,000 psi.

In addition, it can be heated with chemicals to produce toughened glass, where the chemicals will ion exchange on the glass surface to create compression. However, this method is more costly than heating with lo and cooling so it is not widely used.