High Purity 99.99% SiO₂ Quartz Tube Heat Resistance UV 185nm-2500nm Full Spectrum Transmission

1. Ultra-High Purity & Consistent Quality

• SiO₂ purity above 99.99%, premium grades up to 99.999%
• Extremely low impurity content — no bubbles, no stones, no striae
• No devitrification or deformation at high temperatures, ensuring a longer service life

2. Extreme Heat Resistance & Thermal Stability

• Long-term service temperature 1100°C–1200°C, short-term up to 1450°C
• Melting point approx. 1730°C, far higher than ordinary glass
• Ultra-low thermal expansion coefficient (5.5×10⁻⁷/°C); excellent thermal shock resistance — a tube at 1100°C can be plunged into cold water without cracking

3. Strong Corrosion Resistance & Chemical Inertness

• Highly stable against most acids (except hydrofluoric acid)
• Better alkali resistance than ordinary glass
• No reaction with metals at high temperatures, never contaminating materials
• Ideal for high-cleanliness applications in chemical and semiconductor industries

4. Full-Spectrum Light Transmission & Superior Optics

• High UV transmittance (full 185nm–2500nm band)
• Deep-UV transmittance far exceeding ordinary glass
• Good infrared transmittance as well
• Suitable for UV lamps, lasers and optical instruments

5. Excellent Electrical Insulation & Safe Reliability

• Excellent electrical insulation
• Maintains good dielectric properties at high temperatures
• Suitable for high-frequency, high-voltage electrical equipment

6. Complete Size Range & Customization Support

• Outer diameter range: φ1.5mm – φ300mm
• Wall thickness: 0.5mm – 10mm
• Length up to 3 meters
• Supports cutting, flame-polished ends, flanging, sealing, frosting, flange fitting and other deep processing