The Most Effective Way To Solve The Self-explosion Of Tempered Glass

Jul. 14, 2018

Ultra Large Tempered Glass is actually a type of prestressed glass. In order to increase the strength of the glass, chemical or physical methods are usually used to form compressive stress on the surface of the glass. When the glass is subjected to external force, the surface stress is first offset, thereby improving the bearing capacity and enhancing the resistance of the glass itself. Wind pressure, cold and heat, impact and so on.

Hot dip treatment is also called homogenization treatment, commonly known as 'detonation'. The hot dip treatment is to heat the tempered glass to 290 ° C &plus mn; 10 ° C, and keep it for a certain period of time, so that the nickel sulphide can quickly complete the crystal phase transformation in the tempered glass, so that the tempered glass that could be self-explosive after the original use is artificially broken in advance in the factory. In the hot dip furnace, thereby reducing the self-explosion of the tempered glass in use after installation. This method generally uses hot air as a heating medium, which is called 'HeatSoakTest' in foreign countries, referred to as HST, and is literally translated as hot dip.

In principle, hot dip treatment is neither complicated nor difficult. But actually achieving this process is very difficult. Studies have shown that there are many specific chemical structural formulas of nickel sulfide in glass, such as Ni7S6, iS, NiS1.01, etc., not only the proportion of various components are different, but also may be doped with other elements. The phase change speed is highly dependent on the temperature. Studies have shown that the phase transition rate at 280 ° C is 100 times that at 250 ° C, so it must be ensured that each piece of glass in the furnace experiences the same temperature regime. Otherwise, on the one hand, the glass with low temperature is not enough for the holding time, and the nickel sulfide cannot completely change phase, which reduces the effect of hot dip. On the other hand, when the glass temperature is too high, it may even cause reverse phase transformation of the nickel sulfide, causing a greater hidden danger. Both of these conditions can cause hot dip treatment to be laborious and even counterproductive. The uniformity of temperature during hot-dip furnace operation is so important, and the temperature difference in the furnace of most domestic hot-dip furnaces is even 60 °C during hot-dip insulation. It is not uncommon for foreign imported furnaces to have a temperature difference of about 30 °C. Therefore, although some tempered glass is treated by hot dip, the self-explosion rate is still high.

Although the Heat Soaked Glass does not guarantee that self-explosion will never occur, it does reduce the occurrence of self-explosion and solves the self-explosion problem that plagues the engineering parties. Therefore, hot dip is the most effective way to completely solve the problem of self-explosion in the world.

Ultra Large Tempered Glass