Quartz perforated sheet

Product Introduction

Quartz glass sheets are usually cut and ground from quartz glass, with a silicon dioxide content of over 99.99%. The hardness is Mohs Grade 7, which is characterized by high temperature resistance, low coefficient of thermal expansion, good thermal shock resistance and electrical insulation. Quartz glass sheets are usually colorless and transparent, with a visible light transmittance of over 85%. Quartz glass can be divided into two categories: fused silica glass and synthetic quartz glass. The heat resistance, light transmittance, electrical insulation and chemical stability are all excellent.

Thermal Properties

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, which is the best of all ultraviolet materials, 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 exhibits inertness to any other acid except hydrofluoric acid and hot phosphoric acid, making it the best 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 the most 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 its maximum value near the annealing temperature.

Product specifications:

Round quartz glass sheet

Diameter range Thickness range

Square quartz glass sheet length range: 10mm-800mm; Width range 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 maximum operating temperature, which 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.

Quartz glass tube is a special industrial technology glass made of silica, which is a very excellent basic material. Quartz glass has a series of excellent physical and chemical properties

Our company's characteristics in processing quartz glass include high flatness (plus or minus 0.002MM), high parallelism (plus or minus 0.002MM), small tolerance (plus or minus 0.01), wear resistance, long service life, and increased product quenching process during the processing, greatly increasing the service life of quartz glass and helping customers reduce costs. And quartz glass is a single component of silica glass. It exhibits weak acidity, so it is not alkali resistant. And acid resistance, except for hydrofluoric acid and hot phosphoric acid.

After polishing, the surface roughness of the workpiece can reach Ra0.0002; The flatness can be controlled within the range of ± 0.002mm.

2 Performance Introduction

1. High temperature resistance. The softening point temperature of quartz glass is about 1730 ℃, and it can be used for a long time at 1100 ℃, with a maximum temperature of 1450 ℃ in a short period of time,

2. Corrosion resistance. Except hydrofluoric acid, quartz glass hardly reacts with other acids. Its acid resistance is 30 times that of ceramics and 150 times that of stainless steel. Especially, its chemical stability at high temperature is unmatched by any other engineering material.

3. Good thermal stability. The coefficient of thermal expansion of quartz glass is very small, and it can withstand severe temperature changes. When the quartz glass is heated to about 1100 ℃, it will not burst when it is put into normal temperature water.

4. Good transparency. Quartz glass has good transmittance throughout the entire spectral range from ultraviolet to infrared, with a visible light transmittance of over 93%, especially in the ultraviolet spectral region, with a maximum transmittance of over 80%.

5. Good electrical insulation performance. The resistance value of quartz glass is 10000 times that of ordinary glass, making it an excellent electrical insulation material with good electrical properties even at high temperatures.

Quartz glass optical quartz glass sheets have advantages such as high temperature and high pressure resistance, and are irreplaceable by other optical materials. Quartz glass has good UV transmittance; The absorption of visible light and near-infrared light is extremely low, so it is the basic material for the production of optical fiber. The coefficient of thermal expansion is very small, and the chemical stability is good. Bubbles, stripes, uniformity, and birefringence can be comparable to ordinary optical glass. It is the preferred optical material for working in harsh situations. Mainly used in: special light source, optical instrument, optoelectronics, military industry, metallurgy, semiconductor, optical communication and other fields. It can be tested at a temperature of 1200 degrees and a softening temperature of 1730 degrees.

The specific parameters are as follows:

1. (Far ultraviolet optical quartz glass) Corresponding to the brand JGS1, it is an optical quartz glass melted with high-purity hydrogen and oxygen, which contains a large amount of hydroxyl groups (2000ppm) and has excellent UV transmittance, especially in the shortwave ultraviolet region. Its transmittance far surpasses all other glasses, at 185 μ The transmittance at m can reach 90%, and the synthetic quartz glass has a strong absorption peak at 2730nm without particle structure. It's 185-2500m μ Excellent optical materials within the wavelength range.

2. (UV optical quartz glass) The corresponding grade JGS2 quartz raw material and quartz glass produced by hydrogen oxygen flame contain dozens of ppm of metal impurities. There is an absorption peak (hydroxyl content 100-200ppm) at 2730nm, with stripes and particle structure. It is transmitted through 220-2500 μ Good materials within the m-band range.

3. (Infrared optical quartz glass) Corresponding to the brand JGS3, quartz glass produced using quartz raw materials and vacuum melting method contains dozens of ppm of metal impurities. It has small bubbles, particle structure, and stripes, almost free of (OH), and has high infrared transmittance, with a transmittance of over 85%. Its application band range is 260-3500 μ The optical material of m. Attachment: Optical quartz glass JC/T185-1996 standard, including spectral transmittance, characteristics, etc.

physical property

Quartz glass sheet is a special industrial technology glass made of silica, which is a very excellent basic material. Quartz glass sheets have a series of excellent physical and chemical properties, such as:

1. High temperature resistance. The softening point temperature of quartz glass is about 1730 ℃, and it can be used for a long time at 1100 ℃, with a maximum temperature of 1450 ℃ in a short period of time.

2. Corrosion resistance. Except hydrofluoric acid, quartz glass hardly reacts with other acids. Its acid resistance is 30 times that of ceramics and 150 times that of stainless steel. Especially, its chemical stability at high temperature is unmatched by any other engineering material.

3. Good thermal stability. The coefficient of thermal expansion of the adaptive glass is very small, and it can withstand severe temperature changes. When the quartz glass is heated to about 1100 ℃, it will not explode in normal temperature water.

4. Good transparency. Quartz glass sheets have excellent transmittance throughout the entire spectral range from ultraviolet to infrared, with a visible light transmittance of over 93%, especially in the ultraviolet spectral region, with a maximum transmittance of over 80%.

5. Quartz glass has good electrical insulation performance. The resistance value of quartz glass is 100 times that of ordinary glass, making it an excellent electrical insulation material with good electrical properties even at room temperature.

optical performance

The optical properties of quartz glass sheets have their own uniqueness. They can transmit far ultraviolet rays, making them the best of all UV transparent materials, and can also transmit visible light and near-infrared spectra. Due to its high temperature resistance, extremely small coefficient of thermal expansion, good chemical stability, bubbles, streaks, uniformity and birefringence, quartz glass is comparable to ordinary optical glass, so it is an essential optical material with high stability optical coefficient in various adverse situations.

According to its optical performance, it can be divided into three categories:

Far UV JGS1

Transparent within the UV and visible spectral range; No absorption band within the 185-250nm wavelength range; There is a strong absorption band in the range of 2600-2800nm; Non luminescent, stable light radiation.

UV JGS2

Transparent within the UV and visible spectral range; No absorption band within the 200-250nm wavelength range; There is a strong absorption band in the range of 2600-2800nm; Non luminescent, stable light radiation.

Infrared JGS3

Transparent within the visible and infrared spectral range; There is no obvious absorption band in the range of 2600-2800nm. Compared with ordinary silicate glass, transparent quartz glass exhibits excellent transmittance throughout the entire wavelength head. The spectral transmittance in the infrared region is greater than that of ordinary glass; In the visible area, the transmittance of quartz glass is also relatively high. In the ultraviolet spectral region, especially in the shortwave ultraviolet region, the spectral transmittance is much better than other glasses.

The spectral transmittance is influenced by three factors: reflection, scattering, and absorption. The reflection of quartz glass is generally 8%, with a larger ultraviolet region and a smaller infrared region. So the transmittance of quartz glass is generally not greater than 92%. The scattering of quartz glass is relatively small and can generally be ignored. Spectral absorption is closely related to the impurity content and production process of quartz glass; The transmittance in the wavelength range below 200 nanometers represents the amount of metal impurities present; The absorption of 240 sodium meters represents the amount of hypoxic structure; The absorption in the visible band is caused by the presence of transition metal ions, and the absorption of 2730 nm is the absorption peak of hydroxyl groups, which can be used to calculate the hydroxyl content.

Product Usage Scope

The various characteristics of quartz glass indicate that it is one of the indispensable excellent materials in modern cutting-edge technologies, such as space technology, atomic energy industry, automation system, semiconductor, metallurgy, chemical industry, electric light source, communication, light industry, building materials, electro-optic source, semiconducting communication device, laser, optical instrument, laboratory instruments, electrical equipment, medical equipment and chemical instruments resistant to high temperature and corrosion, It is widely used.

It can be processed into transparent quartz discs, square pieces, flanges, etc., used for materials such as windows and semiconductor quartz accessories.

Special specifications of quartz blocks or quartz plates can also be obtained through re thermal shaping; And can be drawn into quartz tubes and rods. It is used as semiconductor accessory material and auxiliary material for optical fiber manufacturing.

Precautions for product 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 maximum operating temperature, which should not be exceeded during use, otherwise it may 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, and attention should be paid when using.

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.