Our EFG-grown sapphire tubes are manufactured using the Edge-defined Film-fed Growth (EFG) method, known for producing high-quality single-crystal sapphire. These tubes offer exceptional mechanical strength, optical clarity, and thermal stability. EFG-grown sapphire tubes are ideal for a wide range of industries, including semiconductor processing, laser systems, high-temperature applications, and scientific instrumentation.
These tubes are available in various customizable sizes and wall thicknesses, offering versatility for numerous demanding applications where strength, precision, and high-performance material properties are critical.
| Property | Specification |
|---|---|
| Matériau | >99.99% pure α-Al₂O₃ (single crystal) |
| Growth Method | Edge-defined Film-fed Growth (EFG) |
| Orientation | C-Plane <0001> |
| Hardness (Mohs) | 9 (second only to diamond) |
| Conductivité thermique | 30 W/m·K at 25°C (5× higher than quartz) |
| Thermal Shock Resistance | Withstands ΔT >500°C (water quench test per ASTM C1525) |
| Compressive Strength | >2 GPa |
| Flexural Strength | 600-750 MPa (3-point bend, ASTM C1161) |
| Young’s Modulus | 390 GPa |
| Transmission | >80% light transmittance (400-700nm) |
| Birefringence | <5 nm/cm (compensated for laser applications) |
| Dimensional Tolerance | ID/OD ±0.02mm |
| Size Range | Customizable from 5mm to 150mm (diameter); Length up to 500mm |
| Surface Finish | Polished or Unpolished (customizable) |
Unmatched Durability:
With a Mohs hardness of 9, these tubes are highly resistant to wear, scratches, and mechanical damage, making them ideal for high-stress and abrasive environments.
Superior Thermal & Chemical Resistance:
Sapphire tubes are known for their ability to withstand extreme temperatures ranging from -200°C to 1,800°C and for their exceptional thermal shock resistance. They are also highly resistant to strong acids, alkalis, and plasma corrosion, ensuring long-lasting performance even in aggressive conditions.
High Optical Clarity:
Our sapphire tubes maintain over 80% light transmittance in the visible spectrum (400-700nm), making them ideal for high-precision optical applications. The low birefringence (<5 nm/cm) ensures minimal optical distortion, especially useful for laser systems.
Customizable Sizes & Precision:
Available in a wide range of diameters and lengths (up to 500mm), with dimensional tolerances of ±0.02mm, our sapphire tubes can be tailored to your specific needs, making them suitable for a variety of industrial and scientific applications.
Excellent Mechanical Properties:
These tubes offer high compressive strength (>2 GPa) and flexural strength (600-750 MPa), ensuring they can handle mechanical stress and pressure while maintaining structural integrity.
Efficient Production Process:
The EFG method allows for the production of longer tubes with consistent dimensions, reducing production time and ensuring reliability for high-volume orders.
Semiconductor Manufacturing:
Plasma Etching Chambers: High resistance to plasma corrosion extends equipment life.
Wafer Processing Observation Windows: Sapphire’s high transparency and thermal stability make it ideal for monitoring wafer processes at elevated temperatures.
Laser Systems:
Laser Gain Media Tubes: Sapphire tubes offer low optical loss for excimer, CO₂, and fiber lasers.
Beam Delivery Components: Protects laser nozzles from high-energy densities, ensuring precise performance.
High-Temperature Industrial Applications:
Thermal Process Tubes: Used in crystal growth furnaces, these tubes can withstand temperatures up to 2,100°C.
Molten Metal Handling: Ideal as thermocouple protection tubes in aluminum and superalloy processing.
Combustion Analysis: Sapphire tubes offer thermal shock resistance for flame tubes in turbine engine test stands.
Scientific Instrumentation:
Synchrotron Beamlines: Sapphire tubes are used in X-ray windows and monochromators, providing high transparency and resistance to radiation damage.
Cryogenic Systems: Effective for low-temperature research applications (up to 4K).
High-Pressure Cells: Used in extreme pressure research, including diamond anvil cell components for pressures exceeding 100 GPa.
Medical Technology:
Surgical Laser Delivery Systems: Provides excellent resistance to sterilization and wear, making them ideal for endoscopic laser applications.
MRI-Compatible Sensor Housings: Offers transparency and mechanical strength for MRI equipment.
Dental Handpieces: Sapphire tubes are used in dental tools for their resilience and sterilization compatibility.
Q1: What is the difference between EFG-grown and KY-grown sapphire tubes?
A: EFG-grown sapphire tubes are produced using a different growth method that allows for longer and more uniform tubes, making them more cost-effective for larger sizes. They are ideal for applications where thermal shock resistance, mechanical strength, et chemical inertness are crucial. While both types offer excellent properties, KY-grown sapphire tubes tend to have higher optical quality and are preferred for applications where ultra-high precision is needed.
Q2: What are the packaging standards for EFG-grown sapphire tubes?
A: We provide aerospace-grade packaging:
Primary Packaging: Class 100 cleanroom vacuum-sealed bags to preserve material integrity.
Secondary Packaging: Custom foam-insulated cases to protect the tubes from mechanical damage during transport.
