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8'' Sapphire Tube
, Single Crystal Al2O3 Sapphire Tube
Sapphire Tube length 203.2 mm Pressure Resistant Customized Size Single Crystal Al2O3
Sapphire Tube length 203.2 mm Pressure Resistant Customized Size Single Crystal Al2O3
This sapphire tube, crafted from single-crystal Al₂O₃ (99.99% purity), offers exceptional pressure resistance, thermal stability, and optical clarity, making it ideal for demanding industrial, scientific, and optical applications. With a standard length of 203.2 mm (8 inches) and customizable diameters/wall thicknesses, it is engineered to withstand extreme environments, including high-pressure chambers, corrosive fluids, and high-temperature processes. Its high transparency (80%+ from UV to mid-IR), 9 Mohs hardness, and chemical inertness ensure reliability in semiconductor equipment, laser systems, and analytical instrumentation.
Key Features of Sapphire Tubes
Single-Crystal Al₂O₃ (Sapphire): Ensures high structural integrity and minimal grain boundaries.
High Pressure Resistance: Withstands pressures exceeding 300 MPa (dependent on wall thickness).
Thermal Stability: Melting point ~2,050°C, suitable for extreme heat applications.
Optical & Mechanical Excellence
Broadband Transparency: 80%+ transmission from 200 nm (UV) to 5,500 nm (mid-IR).
Scratch & Chemical Resistance: 9 Mohs hardness, inert to most acids/alkalis (except HF).
Low Gas Permeability: Ideal for vacuum and high-purity gas systems.
Precision Engineering
Customizable Dimensions: Inner/outer diameter (ID/OD) and length tailored to application needs.
Polished Surfaces: Optional ultra-smooth (Ra <0.5 nm) or ground finishes for specific uses.
Consistency & Reliability
Crystallographic Orientation: C-axis, A-axis, or R-axis growth for specialized needs.
Low Defect Density: Minimizes optical scattering and mechanical weaknesses.
Applications of Sapphire Tubes
High-Pressure & Vacuum Systems
Pressure vessels, viewports, and sensor housings for semiconductor processing.
Supercritical fluid reactors in chemical research.
Optics & Laser Technology
Laser tube enclosures (CO₂, excimer lasers).
UV-IR optical windows and light guides.
Industrial & Analytical Instruments
Chromatography columns, gas/liquid flow cells.
Corrosion-resistant liners for harsh chemical environments.
Aerospace & Defense
Missile guidance windows, IR domes.
Radar & sensor protection in extreme conditions.
Medical & Scientific Research
MRI components, endoscopy sheaths.
Cryogenic sample holders (low thermal expansion).
Specifications
|
Category
|
Parameter
|
Specification
|
| Dimensions |
Inner Diameter (ID) |
8.000" ±0.005" (203mm) |
| |
Wall Thickness (WT) |
0.2–1.5" (5–38mm) |
| |
Length (L) |
6–72" (150–1,800mm) |
| Mechanical |
Burst Pressure |
2,000–5,000 psi |
| |
Weibull Modulus |
15 (high reliability) |
| Thermal |
Max Continuous Temp |
1,800°C (inert) |
| Optical |
Transmission |
85%@200nm → 92%@4μm |
| Electrical |
Volume Resistivity |
>10¹⁴ Ω·cm |
FAQ
Q1: Lead time for custom 8" tubes?
- Standard: 8 weeks
- Coated/Flanged: +2 weeks
- Rush Service: 5 weeks (+30% fee)
Q2: How does cost compare to quartz?
|
8"x12"x0.5" Tube
|
Sapphire
|
Fused Quartz
|
| Unit Price |
$18,000 |
$3,200 |
| Lifespan |
10+ years |
2–3 years |
Q3: Minimum bending radius?
- Not bendable – Single crystal must be machined to shape
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