How does tempered glass crack?

Tempered glass automatically explodes without direct mechanical external force, which belongs to tempered glass self-explosion. Self-explosion is one of the inherent characteristics of tempered glass, and the self-explosion rate of ordinary tempered glass is about 1 ~ 3%.

Several factors affecting the spontaneous explosion of tempered glass;

1. Glass contains impurities, stones, bubbles, etc. The point where the maximum stress value in the local area of glass is higher than the average stress value is called the stress concentration point. If they happen to be in the same area, it is easy to cause an explosion.

2. Glass contains nickel sulfide crystals.

At present, the production technology is limited, and most tempered glass contains nickel sulfide crystals. Hot-dip treatment can make nickel sulfide quickly complete the crystal phase transformation in tempered glass and break it in the hot-dip furnace of the factory in advance, thus reducing the self-explosion of tempered glass after installation.

3. Defects such as scratches, cracks, and deep explosion edges on the glass surface due to improper processing or operation are easy to cause stress concentration or self-explosion. Therefore, the installer is also very important, and fans are also very concerned about this piece. All masters have to go through one-on-one special training and construction practice before they can officially take up their posts.

If you are really worried, you can stick an explosion-proof film on the glass, but the texture will be affected. Secondly, at present, the broken tempered glass has no sharp corners, which is not harmful. Usually pay attention to whether there is any bump damage, which can reduce the risk of glass self-explosion.