Sapphire Tubes Customized Tubular Components 99.999% Al₂O₃ 80%-90% Transmittance For Endoscopic Catheter
Sapphire tubes and customized tubular components are high-performance optical elements precision-engineered from single-crystal aluminum oxide (α-Al₂O₃). Distinct from standard circular tubing, these custom sapphire tubes can be fabricated with specialized cross-sections (square, hexagonal, D-shaped, etc.) while maintaining sapphire's intrinsic properties: ultra-high hardness (Mohs 9), broad-spectrum transmission (UV to IR wavelengths), and exceptional chemical stability. Their unique structural adaptability makes them ideal for specialized optical transmission, extreme-environment sealing, and fluid control systems, with critical applications in high-power lasers, semiconductor equipment, and high-temperature observation systems.
Key Characteristics
1. Complex Structural Customization:
· Supports asymmetric cross-sections (internal/external polygons, tapered diameters, etc.) with inner diameter tolerances controlled within ±0.05mm, meeting requirements for complex optical paths or fluid channels.
2. Extreme Environmental Resistance:
· Withstands prolonged 800°C operation (short-term 1500°C exposure), exhibits excellent thermal shock resistance (CTE: 5.3×10⁻⁶/°C), and resists strong acid/alkali corrosion (pH1-14), making it suitable for chemical reactors or plasma processing equipment.
3. Optical & Mechanical Performance:
· 80% transmittance from UV to mid-IR, with optional anti-reflection coatings (<1% reflectivity) on inner/outer walls
· Flexural strength >500MPa, maintaining structural integrity even at minimal wall thicknesses (0.5mm)
4. Sealing & Surface Properties:
· Internal/external surfaces polished to Ra≤10nm, capable of high-vacuum sealing (leak rate <1×10⁻⁹ Pa·m³/s), meeting cleanliness standards for semiconductor and laser systems.
Technical Parameters
| Product Name | Sapphire Optical Tubes |
| Hardness | 9 Mohs |
| Melting Point | 2,050°C (3,722°F) |
| Density | 3.98 g/cm³ |
| Thermal Conductivity | 25 W/m·K at 20°C |
| OD/ID/Length | 20/16/320 |
| Refractive Index | 1.76 at 589 nm |
| Optical Transparency | 5.3 × 10⁻⁶ /°C |
| Electrical Resistivity | > 10¹⁴ Ω·cm |
| Poisson's Ratio | 0.25 |
Primary Applications
1. Laser Technology:
As gas discharge tubes or beam conduits in high-power lasers, custom sapphire tubes withstand >5kW/cm² laser loads while minimizing thermal lensing effects.
2. Semiconductor Processing Equipment:
Serve as observation ports or gas delivery tubes in etchers and MOCVD reaction chambers, resisting plasma erosion while maintaining contamination-free transmission.
3. High-Temperature Industrial Monitoring:
Function as viewport tubes in molten metal or glass furnaces (>1000°C), ensuring stable signal transmission under extreme conditions.
4. Medical & Scientific Instruments:
As endoscopic catheters or X-ray guide tubes in synchrotron radiation systems, combining biocompatibility with radiation stability.
