Quartz glass plate are special industrial materials made from high-purity silicon dioxide (purity ≥99.99%) through smelting, cutting and grinding. Quartz glass plate feature a Mohs hardness of 7, high-temperature resistance (long-term service temperature up to 1100℃), low thermal expansion, high thermal stability and excellent electrical insulation. Under normal conditions, quartz glass plate are colorless and transparent, with a visible light transmittance exceeding 85%.
According to spectral performance, quartz glass plate is classified into three types: JGS1 (far ultraviolet), JGS2 (ultraviolet), and JGS3 (infrared), corresponding respectively to the high light transmittance characteristics of the 185-250nm and 200-250nm ultraviolet bands and the infrared region. Its optical performance is affected by reflection, scattering, and the content of hydroxyl impurities. Through single and double-sided polishing processes, a surface roughness of less than 5A can be achieved. Quartz glass plate is widely used in semiconductor, laser systems, precision optical instruments, medical equipment and other fields, and is a core material for key components in high-temperature and corrosive environments.
The optical properties of quartz glass plates have their unique features. Quartz glass plate can not only transmit far ultraviolet rays, being the best among all ultraviolet-transmitting materials, but also transmit visible light and near-infrared spectra. Due to its high-temperature resistance, extremely small coefficient of thermal expansion, good chemical stability, and the fact that its bubbles, streaks, uniformity can rival those of ordinary optical glass, quartz glass is an indispensable optical material with a high stable optical coefficient for operation in various harsh conditions.
It can be classified into three categories according to its optical performance:
1. Far ultraviolet optical quartz glass plate JGS1
Transparent in the ultraviolet and visible light spectra; There is no absorption band in the 185-250nm wavelength range. There is a strong absorption band within the 2600-2800nm wavelength range. Non-luminescent, stable light radiation.
2. Ultraviolet optical quartz glass plate JGS2
Transparent in the ultraviolet and visible light spectra; There is no absorption band in the 200-250nm wavelength range. There is a strong absorption band within the 2600-2800nm wavelength range. Non-luminescent, stable light radiation.
3. Infrared optical quartz glass plate JGS3
Transparent in the visible and infrared spectral ranges; There is no obvious absorption band in the 2600-2800nm band range.
Compared with ordinary silicate glass, transparent quartz glass plate has excellent transmission performance throughout the entire wavelength range. The spectral transmittance in the infrared region is greater than that of ordinary glass. In the visible region, the transmittance of quartz glass is also relatively high. In the ultraviolet spectral region, especially in the short-wave ultraviolet region, the spectral transmission is much better than that of other glasses
Spectral transmittance is influenced by three factors: reflection, scattering and absorption. The reflection of quartz glass is generally 8%, with a larger reflection in the ultraviolet region and a smaller reflection in the infrared region. Therefore, the transmittance of quartz glass is generally no more 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 level of transmittance in the band below 200 sodium meters indicates the amount of metal impurities. The absorption of 240 sodium meters indicates the amount of anoxic structures. The absorption in the visible band is caused by the presence of transition metal ions. The absorption of 2730 sodium is the absorption peak of hydroxyl groups, which can be used to calculate the content of hydroxyl groups.
Quartz glass plate are special industrial technical glasses made of silicon dioxide and are an extremely excellent basic material. Quartz glass plate possess a series of excellent physical and chemical properties, such as:
1. High-temperature resistant. The softening point of quartz glass plate is approximately 1730℃. It can be used for a long time at 1100℃, and the maximum short-term operating temperature can reach 1450℃.
2. Corrosion resistance. Except for hydrofluoric acid, quartz glass plate hardly undergoes chemical reactions with other acidic substances. Its acid resistance is 30 times that of ceramics and 150 times that of stainless steel. Especially at high temperatures, its chemical stability is unmatched by any other engineering material.
3. Good thermal stability. Quartz glass plate has an extremely small coefficient of thermal expansion and can withstand drastic temperature changes. Even when heated to around 1100℃ and then placed in water at room temperature, it will not crack.
4.Good light transmission performance. Quartz glass plates have excellent light transmission performance throughout the entire spectral band from ultraviolet to infrared. The visible light transmittance is above 93%, and especially in the ultraviolet spectral region, the maximum transmittance can reach over 80%.
Further processing of quartz glass plate:
Two sides polishing, one side polishing and one side grinding, six-sided polishing, laser drilling, chamfering, edge fire polishing, sandblasting, slotting, gold coating , aluminum coating and so on.
In the realm of UV curing systems, the integration of quartz plates stands out as a pivotal choice. These plates offer a myriad of benefits that significantly enhance the efficiency, quality, and longevity of the curing process. From filtering out harmful infrared radiation to ensuring optimal UV transmission, quartz plates play a crucial role in various industries where precision and quality are paramount.
One of the primary functions of quartz plates in UV curing systems is their ability to filter out infrared (IR) radiation while allowing UV radiation to pass through. This characteristic is essential for maintaining efficient temperature control within the system. By preventing the buildup of excess heat, quartz plates safeguard against potential damage to both the substrate being treated and the components of the UV system itself. This feature is particularly beneficial in applications where maintaining a specific temperature is critical, such as in the curing of low-density or lightweight surfaces.
Application of quartz glass plate:
The formation of quartz glass plate is the result of their melt having a very high viscosity at high temperatures. Quartz glass plate is widely used in the production of semiconductors, electric light sources, semiconductor communication devices, lasers, optical instruments, laboratory instruments, electrical equipment, medical equipment, and high-temperature and corrosion-resistant chemical instruments, as well as in the chemical, electronic, metallurgical, building materials, and national defense industries.
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