External causes of tempered glass processing that can cause tempered glass to burst include load, impact, solder droplets, improper gaps, and edge damage that can cause tempered glass breakage, although the risk of breakage is low because of the high stress of the tempered glass. Tempered glass with clean cut edges will not break the thermal stress under normal environmental conditions, because they require the temperature difference between the center and the edge of the glass to reach 90 °C-150 °C, and the internal factors causing the damage of the tempered glass include tempering. Stress concentration areas such as glass edge defects, excessive stress inside the tempered glass, and nickel sulfide impurities in the tempered glass. The first two factors are caused by process control during the processing of tempered glass. The factors of nickel sulfide are produced in the original glass production process.
The inside of the tempered glass processing may contain nickel sulfide impurities, which exist in a small crystal state. Under normal circumstances, the glass will not be damaged, but since the tempered glass is reheated, the phase state of the nickel sulfide impurities is changed, and the high temperature state of the nickel sulfide is When the glass is frozen, it will freeze. It may take several years for them to recover to the embarrassing state. Due to the low temperature, the nickel sulfide impurities will increase in volume and cause local stress concentration inside the glass. At this time, the tempered glass. Will happen. However, only relatively large impurities will cause self-explosion, and tempered glass self-explosion will occur only when the impurities are at the core of the tensile stress. Nickel sulphide can occur at any time after production is completed
In order to reduce the possibility of tempered glass on the building, on the one hand, it is necessary to strictly control the edging precision of the glass and strictly control the tempering process in the processing and manufacturing process, and reduce the internal stress of the tempered glass as much as possible in order to meet the quality requirements of tempered glass. The original glass is strictly selected, and the nickel sulfide crystal is excluded from the tempering process. Finally, the tempered glass is subjected to hot dip treatment.

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