Quartz Tube
Quartz Plate
Quartz Rod
Optical Applications
Semiconductor Industry
Laboratory and Chemical Applications
High-temperature quartz view windows are a type of viewing window designed to operate stably and without damage in high-temperature environments, such as in high-heat fields with open flames or in hot air environments without open flames.
- ayment method: By wire transfer or advance payment, depending on the quantity of the order.
- Delivery time: According to the order quantity.
- Transportation method: Sea freight or air freight, depending on the customer.
Remarks：
To confirm the order, The following parameters need to be provided: ① Square: length, width, thickness ② Circle: diameter, thickness ③ Accuracy ④ Quantity
| Property Content | Property Values |
|---|---|
| SiO2 | 99.99% |
| Density | 2.2×10³ kg/cm³ |
| Hardness | 5.5 - 6.5 Mohs' Scale 570 KHN 100 |
| Tensile Strength | 4.8×10⁷ Pa (N/mm2) (7000 psi) |
| Compression Strength | >1.1×10⁹ Pa (160,000 psi) |
| Coefficient of Thermal Expansion | 5.5×10⁻⁷ cm/cm·°C (20°C-320°C) |
| Thermal Conductivity | 1.4 W/m·°C |
| Specific Heat | 670 J/kg·°C |
| Softening Point | 1730°C (3146°F) |
| Annealing Point | 1210°C (2210°F) |
| Strain Point | 1120°C (2048°F) |
| Work Temperature | 1200°C (2192°F) |
| Electrical Resistivity | 7×10⁷ ohm cm (350°C) |
| Size | Customized |
| Logo | Customized Logo Accept |
JGS1
Commonly known as UV-grade fused silica, this material exhibits exceptionally low dispersion and very high transmittance in the ultraviolet (UV) spectral range.
JGS2
Similar to JGS1, but may have variations in specific performance parameters such as transmittance and thermal expansion coefficient, depending on the manufacturer’s standards.
JGS3
Typically used in applications requiring higher purity or specialized performance characteristics. Specific performance parameters can vary based on the manufacturer.
High-Temperature Resistance
Quartz glass, as the primary material for these view windows, exhibits extremely high-temperature resistance. Its softening point reaches approximately 1730°C, and it can be used continuously at 1100°C, with short-term use up to 1450°C. This enables high-temperature quartz view windows to withstand various high-temperature environments without deformation or fracture.
High Light Transmission
Quartz glass typically has a light transmittance greater than 90%, with transmittance exceeding 93% in the visible light range, and a high transmittance in the UV spectral range. This high light transmission allows high-temperature quartz view windows to provide a clear view of production processes within high-temperature equipment.
Chemical Stability
Quartz glass possesses excellent chemical stability, with almost no reaction to other acids, and acid resistance that is 30 times greater than ceramics and 150 times greater than stainless steel. This allows high-temperature quartz view windows to operate reliably over long periods in corrosive environments, such as acids and alkalis.
Low Thermal Expansion Coefficient
Quartz glass has a very low thermal expansion coefficient and can withstand sudden temperature changes. Even when heated to approximately 1100°C and then quickly placed into room-temperature water, it will not fracture.
Application Scenario
Steel and Metallurgy Industry
Used as observation windows for high-temperature equipment such as blast furnaces and converters.
Petrochemical Industry
Used as observation windows for various equipment such as reactors and heating furnaces.
Power Plants and Cement Plants
Used as observation windows for high-temperature equipment such as boilers and kilns.
Semiconductor and Precision Optical Instrument Industries
Used as observation windows for equipment such as high-temperature testing chambers and heat treatment furnaces.
Quartz view windows have good light transmission across the entire spectrum from ultraviolet to infrared, with a visible light transmittance exceeding 93%. In the ultraviolet spectral range, the transmittance can reach over 80%.
Quartz view windows exhibit high dielectric strength and very low electrical conductivity (low dielectric loss). Even at high temperatures, their electrical conductivity and dielectric loss remain lower than those of many other materials, making them suitable as high-frequency and voltage insulation materials under high-temperature and mechanical stress conditions.
Quartz view windows possess excellent chemical stability and, with the exception of hydrofluoric acid, exhibit almost no chemical reactions with other acids, and have excellent corrosion resistance.
Frequently asked questions
Quartz glass is a hard and brittle material with excellent physical and chemical properties, extremely high mechanical hardness, good electrical insulation, high temperature and corrosion resistance, low and stable delay performance, good light transmittance, etc. It is widely used in semiconductors, optics, electricity, chemistry, aerospace, automobiles and other fields. Hard and brittle materials are difficult to process, and many fields urgently need cutting processes with small edge collapse, less material loss, low cross-section roughness, and a wide cutting thickness range. The traditional cutting method of quartz glass is mechanical cutting, that is, wheel cutting. Non-traditional cutting methods include water jet cutting, electrochemical discharge wire cutting, continuous laser cutting, etc. Mechanical cutting has low cost, but the contact between the wheel and the material causes large tool wear, and the material is easily contaminated by the tool. Quartz glass is prone to edge collapse, microcracks, and residual stress, which affects the strength and performance of the material! It is difficult to achieve curve cutting and requires post-processing, such as grinding and polishing. Laser cutting does not directly contact the material, has no contact stress, and can perform complex curve cutting. Picosecond laser has the advantages of small spot diameter, high precision, short action time with the material, and small action area, and is suitable for the processing of hard and brittle materials.
。
