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Sapphire Glass Window for High Pressure and Optical Applications
High-performance sapphire glass windows manufactured from synthetic single-crystal sapphire for extreme pressure, high-temperature, optical, vacuum, and industrial sight glass applications. Available in custom discs, windows, viewports, and precision-machined sapphire components.
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Technical data
Product Overview
High Purity Sapphire Glass Window Manufacturer
Sapphire Glass Windows are manufactured from synthetic single-crystal aluminum oxide (Al₂O₃), combining exceptional optical transmission, extreme hardness, outstanding pressure resistance, and excellent chemical stability.
With a hardness second only to diamond, sapphire windows provide superior scratch resistance and mechanical strength compared with conventional glass, quartz glass, and borosilicate glass. Sapphire is widely used in high-pressure sight glasses, vacuum chambers, semiconductor equipment, laser systems, aerospace instruments, underwater cameras, and scientific research equipment.
I-LUMISTAR manufactures precision sapphire windows, discs, plates, rings, viewports, and custom sapphire components according to customer drawings and technical specifications.
High Purity Sapphire Glass Window— Technical Data
| Category | Item | Parameter Value |
|---|---|---|
| General performance | Chemical Formula | Al₂O₃ |
| Crystal System | Trigonal | |
| Class | Hexagonal-scalenohedral | |
| Melting Temperature | 2050°C | |
| Thermal performance | Thermal Expansion | Parallel to C-axis: 6.7×10⁻⁶ Perpendicular to C-axis: 5.0×10⁻⁶ |
| Specific Heat | 0.18 Cal/g·°K(25°C) | |
| Mechanical properties | Density | 3.99-4.10g/cm³ |
| Hardness | 9 Moh’s Scale (Hv)≥1700kg/mm² | |
| Modulus Of Elasticity | 340-380Gpa | |
| Compressive Strength | 2.1Gpa | |
| Tensile Strength | 0.19Gpa | |
| Optical performance | Index of Refraction | Parallel to C-axis: 1.769 Perpendicular to C-axis:1.76 |
| Index of IR Transmission | 3-5.5um≥90% (coated with anti-reflective film) | |
| Electrical performance | Electrical Resistance | 10¹¹ /cm |
| 10⁶ /cm | ||
| 10³ /cm | ||
| Dielectric Constant | 7.5-10 | |
| Chemical performance | Corrosion Resistance | Can not be corroded by acid or alkali at normal temperature, only can be corroded by HF at 300°C |
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KEY FEATURES
Exceptional Hardness
Mohs hardness of 9, second only to diamond.
Superior Pressure Resistance
Ideal for high-pressure vessels, vacuum chambers, and harsh industrial environments.
Excellent Optical Transmission
High transmission from ultraviolet (UV) through visible to infrared wavelengths.
Outstanding Scratch Resistance
Maintains optical clarity even in abrasive operating conditions.
High Temperature Stability
Suitable for continuous operation at elevated temperatures.
Excellent Chemical Resistance
Resistant to most acids, solvents, and corrosive chemicals.
Custom Manufacturing Service
We provide tailor-made solutions according to drawings or technical requirements.
- Custom diameter
- Custom thickness
- Special pressure design
- Edge polishing
- Optical finishing
- OEM / ODM support
- Custom packaging
TYPICAL APPLICATIONS
- High Pressure Sight Glass Systems
- Vacuum Technology
- Semiconductor Industry
- Aerospace & Defense
- Laser & Photonics
- Underwater Equipment
- Industrial Observation Ports
FAQ
A: Sapphire glass is a transparent material made from synthetic single-crystal aluminum oxide (Al₂O₃), known for its exceptional hardness, strength, and optical performance.
A: Yes. Sapphire provides significantly higher hardness, scratch resistance, and mechanical strength than quartz glass and borosilicate glass.
A: Sapphire can withstand temperatures up to approximately 1800°C in many industrial environments.
A: Yes. Sapphire is widely used in high-pressure sight glasses, subsea equipment, and vacuum systems due to its excellent mechanical strength.
A: Yes. We manufacture sapphire windows in custom diameters, thicknesses, shapes, and surface finishes according to customer drawings.
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