Physical properties of quartz glass

Product Information

Thermal performance:

Quartz glass can operate normally at a temperature of 1350 ℃, with a softening temperature of 1750 ℃. The coefficient of thermal expansion of quartz glass is small, 5.5 × 10-7/℃, only 1/12 to 1/20 of ordinary glass. According to the standard, the sample should be ignited to 1200 ℃ and then quickly thrown into cold water. Repeated three times or more is not allowed to burst.

Optical performance:

The optical performance of quartz glass is unique. It can not only pass through the far ultraviolet ray, but also can pass through the visible light and near infrared spectrum. The coefficient of thermal expansion is very small, and the chemical stability is good. The bubbles, stripes, uniformity, and birefringence are comparable to ordinary optical glass. Therefore, it is an essential optical material with high stability optical coefficient for working in various adverse situations.

Chemical properties:

Quartz glass is an acidic material that is inert to any other acid except hydrofluoric acid and hot phosphoric acid, making it an acid resistant material. At room temperature, the corrosion degree of alkali and salt on quartz glass is also extremely small, so it is not ruled out to use quartz glass in these reagents.

Mechanical properties:

The mechanical properties of quartz glass are better than those of hard glass and ceramics, but the brittleness is poor. The theoretical calculation strength of quartz glass is very high, about 24 × 103MPa, but the actual measured strength is dozens of times lower than this value. The main factor affecting strength is first the surface defects of the glass, especially the size and depth of surface microcracks, which have a significant impact. The flexural strength of finely ground quartz glass samples is about 0.6 times higher than that of coarsely ground samples; Secondly, there are inherent defects, such as bubbles, impurities, uneven melting, and residual stress. The strength of quartz glass increases with the increase of temperature, reaching a value near the annealing temperature.

Product specifications:

Round quartz glass sheet:

Diameter range: 10mm-400mm; Thickness range: 3-100mm

Square quartz glass sheet: Scope of length

Length range: 10mm-800mm;

Width range: 10mm-600mm;

Thickness: 1-100mm

Note: Product specifications can be customized for production and processing based on customer drawings and needs.

Application scope:

It is mainly used in the high-temperature industry of military industry, machinery, metallurgy, printing and dyeing, optical instrument, high-temperature mirrors, fire observation holes and other industries.

Instructions for use:

1. Quartz glass products are valuable materials that must be handled with care and extreme caution when used;

2. All types of quartz glass have a usage temperature that should not be exceeded during use, otherwise it will crystallize or soften and deform;

3. Quartz glass that needs to be used at high temperatures must be wiped clean before use. It can be soaked in 10% hydrofluoric acid or lotion, and then cleaned with high-purity water or treated with alcohol. When operating, thin wire gloves should be worn and direct contact with quartz glass with hands is not allowed;

4. Continuous use of quartz glass products is allowed at high temperatures, which is beneficial for extending the lifespan of quartz glass and improving its temperature resistance. On the contrary, intermittent use of quartz glass products at high temperatures has a limited number of uses;

5. Although quartz glass material has extremely high thermal stability, it can withstand severe temperature fluctuations. However, in practical use, due to differences in residual strain and product shape, there are certain differences in thermal stability, which should be taken into account during use;

6. Quartz glass is an acidic material that should be strictly avoided from contact with alkaline substances (such as water glass, asbestos, potassium sodium compounds, etc.) when used at high temperatures, otherwise its anti crystallization performance will be greatly reduced.