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The quartz tube is a specialized glass tube manufactured from high-purity silicon dioxide. Unlike ordinary glass, it exhibits exceptional thermal stability, high optical transmittance (especially for ultraviolet light), and strong chemical inertness. It is an indispensable basic material for high-temperature and high-purity applications.
1. High purity SiO₂ (≥99.99%) with controlled impurity levels (2–20 ppm)
2. Continuous high-temperature operation up to 1,200°C; short-term tolerance up to 1,500°C
3. Exceptional thermal shock resistance due to low thermal expansion coefficient (5.5 × 10⁻⁷ /°C)
4. Acid and alkali resistance, inert to all chemicals except hydrofluoric acid
5. High light transmittance depending on spectrum (85–95%)
6. Excellent electrical insulation and dielectric properties
7. Available in diameters 20–30 mm and lengths from 10 mm to 3,000 mm
8. Customized inner hole shapes (round, square, or special designs)
9. Tolerance ±0.05 mm and surface roughness Ra <2 nm
| Property | Value |
|---|---|
| Hardness | 5.5–6.5 Mohs, ~570 KHN |
| Design Tensile Strength | 4.8 × 10⁷ Pa |
| Design Compressive Strength | >1.1 × 10⁹ Pa |
| Bulk Modulus | 3.7 × 10¹⁰ Pa |
| Rigidity Modulus | 3.1 × 10¹⁰ Pa |
| Young’s Modulus | 7.2 × 10¹⁰ Pa |
| Poisson’s Ratio | 0.17 |
| Coefficient of Thermal Expansion | 5.5 × 10⁻⁷ cm/cm·°C |
| Thermal Conductivity | 1.4 W/m·°C |
| Specific Heat | 670 J/kg·°C |
| Softening Point | 1683°C |
| Annealing Point | 1215°C |
| Strain Point | 1120°C |
| Electrical Resistivity | 7 × 10⁷ Ω·cm (350°C) |
| Velocity of Sound | Shear: 3750 m/s; Compression: 5900 m/s |
| Sonic Attenuation | <11 dB/m·MHz |
| Chemical Stability | Resistant to water and most acids (except HF) |
Thanks to its excellent thermal stability, high UV transmittance, chemical resistance, and electrical insulation properties, the quartz tube is widely used in the following areas:
1. Lighting & Heating
Infrared heating tubes: Used in industrial ovens, paint drying lines, food warming equipment, and patio heaters. Quartz tubes efficiently transmit infrared radiation.
Halogen lamps: Quartz tubes withstand the high temperatures of halogen bulbs while maintaining high light output.
Ultraviolet (UV) lamps: Used in UV germicidal lamps for water purification, air sterilization, and surface disinfection. Quartz tubes transmit UV light, whereas ordinary glass blocks UV light.
2. Industry & Manufacturing
Semiconductor manufacturing: Used as diffusion furnace tubes, oxidation tubes, and wafer processing chambers. High purity prevents contamination.
Optical fiber production: Used as overcladding tubes for fiber optic preforms.
High-temperature furnaces: Used as furnace liners, thermocouple protection tubes, and high-temperature viewing windows, withstanding temperatures up to 1100°C.
Laser processing: Used as beam transmission protection tubes in laser cutting and welding systems.
3. Laboratory & Scientific Research
Laboratory glassware: High-temperature test tubes, combustion tubes, and reaction vessels.
Analytical instruments: Used in spectrometers, UV analyzers, and other optical instruments requiring UV transmittance.
Chemical processing: Used as tubes for handling corrosive chemicals or high-purity reactions.
4. Environmental & Medical
Water sterilizers: Quartz sleeves that protect UV lamps in water treatment systems (drinking water, wastewater, pool disinfection).
Air purifiers: UV lamp tubes used to kill bacteria and viruses in air ducts.
Medical devices: Used in phototherapy equipment and medical analytical instruments.
5. Solar & Energy
Solar simulators: Quartz tubes used in artificial light source systems for solar panel testing.
Light guides: High-temperature light transmission for specialized energy applications.
Shanghai Xinkehui Materials Co., Ltd. is a professional manufacturer and trader of high-purity quartz tubes, dedicated to providing high-quality fused silica products for global customers.
With years of experience in the quartz industry, we combine in-house manufacturing capabilities with a strong supply chain network to offer competitive pricing, reliable quality, and flexible solutions.
1. Dual Role – Manufacturer & Trader
We are both a manufacturer and a trader. This means you get factory-direct pricing plus access to a wider range of quartz products from our reliable partner network.
2. High-Purity Quartz Tubes
Our quartz tubes are made from high-purity silicon dioxide (SiO₂ ≥ 99.9%), ensuring excellent thermal resistance (up to 1100°C), high UV transmittance, and strong chemical stability.
3. Strict Quality Control
Every product is carefully inspected for dimensional accuracy, thermal shock resistance, and surface finish. We guarantee consistent quality for every batch.
4. Customization Available
We accept OEM orders for different outer diameters, wall thicknesses, lengths, and special shapes such as bends, flanges, and tapered ends.
5. Competitive Pricing
Thanks to our manufacturing base and efficient trading network, we offer high-quality products at reasonable prices.
6. Global Export Experience
We have years of experience exporting to customers worldwide, with reliable logistics and on-time delivery.
7. One-Stop Solution
From standard quartz tubes to custom components, we provide a complete range of products to meet your needs under one roof.
8. Professional Service
Our team responds quickly, provides technical support, and ensures a smooth purchasing experience from inquiry to delivery.
