1. Glass Quality Defects

One of the primary causes of self-explosion is the presence of impurities or structural flaws within the glass. These defects act as stress concentrators, making the glass more prone to spontaneous breakage. Some common issues include:

• Impurities and stones: Small particles or stones embedded in the glass can create weak points, especially if they are located in the tensile stress zone. This increases the risk of cracks forming and spreading.
• Nickel sulfide inclusions: These microscopic crystals often appear as small, metallic spheres and can expand when exposed to temperature changes, leading to internal pressure and potential breakage.
• Surface damage: Scratches, chips, or other surface imperfections caused by improper handling or processing can also lead to stress concentration, increasing the likelihood of self-explosion.

High-quality tempered glass is typically sourced from reputable manufacturers with strict quality control to minimize such defects.

2. Uneven Stress Distribution

During the tempering process, the glass is heated and then rapidly cooled, creating a balance of compressive and tensile stresses across its thickness. However, if this stress distribution is uneven or misaligned, it can lead to instability. For example:

• If the tensile stress zone is shifted toward one side or the surface, the glass becomes more susceptible to spontaneous breakage.
• Sudden temperature changes, such as exposure to cold air, can cause what is known as "wind explosion," where the glass shatters due to thermal shock.

This type of failure is more common in improperly tempered or unevenly treated glass.

3. Degree of Tempering

The intensity of the tempering process directly affects the likelihood of self-explosion. Research has shown that as the degree of tempering increases, so does the risk of spontaneous breakage. For instance:

• When the tempering level reaches 1/ cm, the self-explosion rate can be as high as 20-25%.
• This indicates that higher stress levels, while improving strength, also increase the probability of internal failures over time.

Therefore, while tempered glass is known for its durability, it's important to understand that self-explosion is a natural risk associated with its manufacturing process.

Door and Window Surround

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Suntronic New Materials Technology Co., Ltd. , https://www.dsmdecor.com