What kind of problems will arise from the chemical composition of tempered glass

Chemical composition of tempered glass
General glass is mainly silicate and only pure quartz glass contains only silicon dioxide. In addition to optical fibers, there are many glass fibers, such as electronic fibers, high-modulus fibers, chemical-resistant fibers, etc.

Tempered glass

Tempered glass is made from ordinary glass after heat treatment. Tempered glass is a prestressed glass. To improve the strength of 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, and then the bearing capacity is improved and the wind pressure resistance, summer heat resistance, impact resistance, etc. are enhanced.

Tempered glass is made by cutting ordinary annealed glass into the required size, heating it to about 700 degrees close to the softening point, and then cooling it quickly and evenly (usually 5-6MM glass is heated at 700 degrees for about 240 seconds and cooled for about 150 seconds. 8-10MM glass is heated at 700 degrees for about 500 seconds and cooled for about 300 seconds. In short, the time for heating and cooling is different depending on the thickness of the glass).

What problems are prone to tempered glass?

1. Although the strength of tempered glass is stronger than that of ordinary glass, tempered glass has the possibility of self-explosion, while ordinary glass has no possibility of self-explosion.

2. Tempered glass can no longer be cut and processed, but can only be processed into the required shape before tempering, and then tempered.

3. The surface of tempered glass will be uneven and slightly thinner. The reason for thinning is that the glass is thinner after tempering than before tempering, because the glass is quickly cooled by strong wind, the crystal gap inside the glass becomes smaller, and the pressure becomes greater. Generally, 4~6mm glass is thinned by 0.2~0.8mm after tempering, and 8~20mm glass is thinned by 0.9~1.8mm after tempering. The specific degree depends on the equipment, which is also the reason why tempered glass cannot be used as a mirror.

4. Flat glass used in buildings usually deforms after passing through the tempering furnace, and the degree of deformation will be determined by the equipment and technicians. To a certain extent, it will affect the decorative effect.