High-purity quartz discs for sight glasses. Withstand 1200°C, ultra-clear, chemical resistant. Custom sizes. Get a quote now!
| Material | Quartz Glass |
|---|---|
| Standard | Working temperature up to 1200℃ |
| Size | Diameter 10-420mm |
| Thickness | 1-30mm |
| Edge | Grind or Polish |
Material: quartz glass
Maxium working temperature: 1200 °C.
Working pressure: Depends on diameter and thickness.
Diameter: 10-420mm.
Thickness: 1-85mm
Quartz glass technique specification:
| Chemical Performance | ||
| 1 | SiO2 | 99% |
| 2 | Water resistance | ISO0719 I |
| 3 | Acid resistance | ISO0195 I |
| 4 | Alkali resistance | ISO0695 I |
| Mechanical Performance | ||
| 5 | Density ρ | 2.2g/cm3 @24℃ |
| 6 | Bending Strength | 68N/mm2 |
| 7 | Tensile stress | 50N/mm2 |
| 8 | Young’s modulus | 68 Mpa |
| 9 | Poisson’s ratio | 0.17 |
| 10 | Hardness | 7 Mohs |
| 11 | Elastic Modulus | 7.5 104N/MM2 |
| Thermodynamic Performance | ||
| 12 | Thermal Expansion Coefficient (0-300℃）(20-300) | 0.55*10-6K-1 |
| 13 | Softening Point | 1730±10℃ |
| 14 | Strain Point | 1054±10℃ |
| 15 | Annealing Point | 1204±10℃ |
| 16 | Thermal Shock Resistance | 500K |
| 17 | Max Working Temperature | ≤1700℃ Short time (＜10h） |
| 18 | Max Working Temperature | ≤1200℃ Long time (＞10h） |
| Eletric Property | ||
| 19 | Electric Volume Resistivity | 1018Ωxm (at 20℃） 1010Ωxm (at 400℃） 6.3×10 6Ωxm (at 800℃） 1.3×10 5Ωxm (at 1200℃） |
| 20 | Dielectric strength | 25-40KV/mm (at 20℃） 4-5KV/mm (at 20℃） |
| 21 | Dielectric Constant εr | 3.7 (at 7.5GHz, 20℃） |
| Optical Property | ||
| 22 | Refractive Index | 1.458 @24℃ |
Light Transmission
Premium Quartz Discs for Sight Glass Applications
Our high-purity quartz discs are engineered for superior performance in demanding industrial sight glass applications. Made from fused silica (SiO₂ ≥99.9%), these discs offer exceptional optical clarity and unmatched resistance to extreme conditions.
Key Features:
✔ Ultra-High Temperature Resistance – Withstands continuous operation up to 1200°C (short-term 1450°C) with near-zero thermal expansion
✔ Optimal Clarity – >90% light transmission (UV to IR spectrum) for clear process monitoring
✔ Chemical Inertness – Resists acids (except HF), alkalis, and corrosive gases
✔ Thermal Shock Resistance – Endures rapid temperature changes up to 1000°C differentials without cracking
✔ Precision Machining – Custom diameters (10-500mm) and thicknesses (1-85mm) with tight tolerances (±0.1mm)
Applications Include:
• High-temperature reactor sight windows
• Semiconductor processing equipment
• Pharmaceutical sterilization systems
• Solar/PV manufacturing
• Chemical plant observation ports
Available with optional features:
Polished/ground edges
Custom specifications and OEM solutions available. Contact us for samples and bulk pricing!
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