How to identify the causes and methods of self explosion of tempered glass? 報錯 筆記雙語

　　How to identify the self explosion of tempered glass? The difference between toughened self explosion and toughened glass impact breaking by external force mainly lies in the difference of initiation point. Generally, the initiation point of self explosion of tempered glass is in the center of the glass. There are obvious butterfly like fragments in the center of the initiation point, commonly known as butterfly spots. Generally, the impact trace can be seen at the breaking point without butterfly spots. The radioactive distribution of broken glass from the impact point.

　　Causes and identification of self explosion of tempered glass:

　　1. Scratches, craters, deep edges and other defects on the glass surface due to improper processing or operation are easy to cause stress concentration or self explosion of tempered glass.

　　2. The glass contains nickel sulfide crystal, and the self explosion of tempered glass caused by the change of phase transformation volume of nickel sulfide crystal.

　　3. There are stones, impurities and bubbles in the glass: impurities in the glass are the weakness of tempered glass and the place of stress concentration. Especially if the stone is located in the tensile stress region of tempered glass, it is an important factor leading to burst.

　　4. The stress distribution of tempered glass is uneven, offset or too high.

　　Generally speaking, the causes of self explosion in the process of glass tempering are mostly 1 and 4; The self explosion of glass after leaving the factory is mostly 2 and 3; After the glass is installed, case 3 is often typical.