CG MATERIAL
Sapphire Tube
Sapphire Tube
CG Material supplies high-quality sapphire tubes manufactured from single-crystal aluminum oxide (Al₂O₃). Sapphire tubing combines exceptional optical transmission, extreme hardness, excellent chemical resistance, and high-temperature stability in a single material.
Compared with quartz, alumina ceramics, and glass tubing, sapphire tubes provide significantly longer service life and superior performance in corrosive, vacuum, plasma, and high-temperature environments.
Sapphire Tube vs Quartz Tube
| Property | Sapphire Tube (Single Crystal Al₂O₃) | Quartz Tube (Fused Silica SiO₂) |
|---|---|---|
| Material | Single Crystal Sapphire | Fused Quartz |
| Purity | 99.99% Al₂O₃ | High Purity SiO₂ |
| Density | 3.97 g/cm³ | 2.20 g/cm³ |
| Mohs Hardness | 9 | 5.5–7 |
| Young's Modulus | 345–470 GPa | 72–73 GPa |
| Flexural Strength | 760–1035 MPa | 80–120 MPa |
| Compressive Strength | ~2000 MPa | 650–1100 MPa |
| Thermal Conductivity | 35–40 W/m·K | 1.3–1.4 W/m·K |
| Maximum Service Temperature | Up to 1800–2000°C | Up to 1100–1200°C |
| Melting Point | 2053°C | 1710°C |
| Thermal Expansion Coefficient | 5–8 ×10⁻⁶/K | 0.5 ×10⁻⁶/K |
| UV Transmission Limit | ~150 nm | ~180–195 nm |
| IR Transmission Limit | ~5 μm | ~2.5–3.5 μm |
| Refractive Index | 1.76–1.77 | 1.46 |
| Vacuum Compatibility | Excellent | Good |
| Chemical Resistance | Excellent | Excellent |
| Alkali Resistance | Excellent | Moderate |
| Wear Resistance | Excellent | Moderate |
| Expected Service Life | Very Long | Moderate |
| Relative Cost | Higher | Lower |
Available Dimensions
Standard Sapphire Tube Sizes
| OD (mm) | ID (mm) | Length (mm) |
|---|---|---|
| 2–10 | Customized | Customized |
| 10–50 | Customized | Customized |
| 50–100 | Customized | Customized |
Sapphire Tube Typical Applications
- Semiconductor Process Chambers
- MOCVD & Epitaxy Systems
- Thermocouple Protection Tubes
- High Temperature Furnaces
- Plasma Processing Equipment
- Vacuum Systems
- Laser and Optical Instruments
- Aerospace Sensors
Sapphire Tube Features
-High Strength, High Rigidity, High Anti-Abrasion, High Anti-Heat, High AntiCorrosion Characteristics, and High Anti-Plasma Characteristics.
Because of these characteristics, Single Crystal Sapphire is widely used for precision mechanical parts.
-Stable Dielectric Constant, Very Low Dielectric Loss, Good Electrical Insulation.
Single Crystal Sapphire is used as a material for substrates in super-high frequency regions. It is also used as an insulation material and microwave window. Single Crystal Sapphire has become indispensable in the Electronics Industries.
-Excellent Light Transmission.
Single Crystal Sapphire is used for various kinds of vacuum equipment, windows in reaction furnace, scanner windows and caps for optical communication due to its excellent mechanical characteristics and heat resistance.
-Good Thermal Conductivity and High Heat Resistance.
Excellent thermal conductivity at low temperatures allows Single Crystal Sapphire as a transparent material to be used in many diverse fields requiring thermal conduction and heat radiation.
FAQ
What is the maximum operating temperature of sapphire tubes?
Sapphire tubes can withstand temperatures above 1800°C depending on the operating atmosphere and application conditions.
Can sapphire tubes be customized?
Yes. We manufacture sapphire tubes according to customer drawings and specifications.
Are sapphire tubes better than quartz tubes?
For high-temperature, high-pressure, vacuum, and wear-resistant applications, sapphire tubes generally provide significantly better performance and longer service life.
What industries use sapphire tubes?
Semiconductor, aerospace, medical, analytical instruments, laser systems, and industrial furnaces.
Request a Quote
Looking for a reliable sapphire tube manufacturer?
Send us your drawing, dimensions, quantity, and application requirements. Our engineering team will provide a customized solution and quotation within 24 hours.
