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Product Introduction
This quartz fiber sleeve is manufactured from quartz fiber, a specialty glass fiber with silicon dioxide (SiO₂) content exceeding 99.9% and filament diameters ranging from 1 to 15 micrometers. The sleeve provides high heat resistance with continuous operation at 1050°C and instantaneous high-temperature resistance up to 1700°C. The quartz fiber exhibits electrical insulation properties with dielectric constant and dielectric loss coefficient characteristics that are among the lowest of all mineral fibers. The quartz fiber sleeve is widely used in aerospace, military, semiconductor, petrochemical, building materials, electrical and electronic, high-temperature insulation, and high-temperature filtration applications.
Core Advantages
Ultra-High Purity
Silicon dioxide content exceeding 99.9% provides consistent thermal and electrical properties across the entire operating temperature range.
Exceptional Temperature Resistance
Continuous operation at 1050°C. Withstands instantaneous exposure up to 1700°C without melting or structural failure.
Superior Electrical Insulation
Dielectric constant and dielectric loss coefficient are among the lowest of all mineral fibers, providing stable electrical insulation at high temperatures.
Fine Filament Diameter
Filament diameters between 1-15 micrometers enable flexible braiding and close conformity to irregular component shapes.
Chemical Purity
The high-purity quartz composition minimizes contamination risk in semiconductor and cleanroom applications.
Low Thermal Conductivity
Provides effective thermal insulation across a wide temperature range from cryogenic to ultra-high temperatures.
Product Features
Base material High-purity quartz fiber with SiO₂ content >99.9%. Filament diameter: 1-15 micrometers. Continuous temperature rating: 1050°C.
Peak temperature resistance Instantaneous exposure up to 1700°C (less than 30 seconds). Melting point: approximately 1700°C.
Electrical insulation properties Dielectric constant: 3.78 at 20°C, 1MHz. Dielectric loss coefficient: 0.0002 at 20°C, 1MHz. Volume resistivity: >1×10¹⁵ Ω·cm.
Thermal conductivity 0.033-0.038 W/m·K at 500°C. Maintains low thermal conductivity across a wide temperature range.
Chemical resistance Resistant to most acids except hydrofluoric acid. Resistant to alkalis and organic solvents. Does not absorb moisture.
Available inner diameters 6mm to 100mm. Standard lengths: 5m, 10m, 20m rolls. Custom diameters and lengths available.
Technical Specifications
| Parameter | Specification |
|---|---|
| Continuous operating temperature | -200°C to +1050°C |
| Short-term peak temperature | Up to 1700°C (less than 30 seconds) |
| Melting point | Approximately 1700°C |
| SiO₂ content | >99.9% |
| Filament diameter | 1-15 micrometers |
| Dielectric constant (20°C, 1MHz) | 3.78Dielectric loss coefficient (20°C, 1MHz)0.0002Volume resistivity>1×10¹⁵ Ω·cmThermal conductivity at 500°C0.033-0.038 W/m·KAvailable inner diameters6mm, 8mm, 10mm, 12mm, 15mm, 20mm, 25mm, 30mm, 40mm, 50mm, 60mm, 80mm, 100mmStandard length5m, 10m, 20m rollsColorTranslucent white / off-white |
Application Scenarios
Aerospace thermal protection systems
Military electronics and avionics
Semiconductor manufacturing equipment
Petrochemical high-temperature processing
Building materials and glass manufacturing
Electrical and electronic insulation
High-temperature filtration systems
Laboratory and research furnace equipment
This quartz fiber sleeve is suitable for demanding applications across multiple high-technology industries. In aerospace and military applications, the sleeve provides thermal protection for wiring and hydraulic lines in high-temperature zones near engines and exhaust systems. In semiconductor manufacturing, the high-purity quartz composition minimizes contamination risk in cleanroom environments and high-temperature diffusion furnaces. Petrochemical applications include insulation of instrument lines and sample tubing in cracking furnaces and high-temperature reactors. The sleeve also serves in electrical and electronic applications where stable dielectric properties are required at elevated temperatures, and in high-temperature filtration systems where chemical purity and thermal stability are essential.
Common Questions and Solutions
What is the difference between quartz fiber and standard glass fiber?
Quartz fiber contains >99.9% silicon dioxide (SiO₂) compared to approximately 55% in standard E-glass. This higher purity provides continuous temperature resistance up to 1050°C versus 550°C for E-glass. Quartz fiber also exhibits significantly lower dielectric constant and dielectric loss, better chemical resistance, and higher purity for contamination-sensitive applications.
How does the sleeve perform under vacuum or inert gas conditions?
Quartz fiber maintains its thermal and electrical properties under vacuum and inert gas atmospheres. The sleeve does not outgas significantly at high temperatures, making it suitable for vacuum furnace applications and aerospace environments. Testing data is available for specific temperature and pressure conditions.
What is the shelf life of the quartz fiber sleeve?
When stored in a clean, dry environment at room temperature, the quartz fiber sleeve has an indefinite shelf life. The material does not degrade over time. Avoid exposure to hydrofluoric acid vapor or high humidity, as moisture absorption may slightly affect dielectric properties in critical electrical applications.
Can the sleeve be used in high-radiation environments?
Yes. Quartz fiber exhibits high radiation resistance compared to organic polymers and many other inorganic fibers. The sleeve maintains structural integrity under gamma and neutron radiation exposure. Contact technical support for specific radiation dose compatibility data for your application.
How should the sleeve be cut to length without fraying?
Cut the sleeve using sharp ceramic scissors or a diamond-coated blade. For critical cleanroom applications, seal cut ends by dipping in high-purity quartz cement or using a small torch to melt the fiber ends together. Avoid cutting with standard metal scissors as this may contaminate the quartz fiber with metal particles.
Is the sleeve compatible with hydrofluoric acid exposure?
No. Quartz fiber reacts with hydrofluoric acid (HF) and will degrade rapidly. Do not use the sleeve in applications where HF vapor or liquid contact is expected. For fluoride-containing environments, alternative materials such as PTFE or perfluoroelastomer sleeves should be used.
Installation and Handling Considerations
Wear clean gloves when handling quartz fiber sleeves for semiconductor or cleanroom applications. Finger oils can contaminate the surface and may affect performance in high-purity environments.
Measure the outer diameter of the component to be protected. Select a sleeve with inner diameter 10-15% larger than the component diameter. Quartz fiber has limited stretch; oversized sleeves are easier to install than tight-fitting sleeves.
For high-temperature applications above 800°C, secure the sleeve using high-purity quartz fiber cord or platinum/nicrome wire. Stainless steel may oxidize and contaminate the quartz fiber at these temperatures.
Avoid kinking or tight bending of the sleeve. The minimum recommended bend radius is 5 times the sleeve diameter. Quartz fiber is more brittle than E-glass and may fracture under sharp bends.
For semiconductor and cleanroom applications, rinse the sleeve with deionized water and dry in a clean oven at 200°C for 2 hours before installation to remove any surface contaminants from the manufacturing process.
Inspect the sleeve for visible defects before installation. Do not use sleeves with broken filaments, discoloration, or contamination. Replace sleeves that show any signs of damage or degradation during periodic maintenance inspections.
