Product Specification

Customizable EFG-Grown Sapphire Tubes High Strength, Precision-Made, Superior Chemical & Thermal Resistance

Product Overview:

Our EFG-grown sapphire tubes are produced using the Edge-defined Film-fed Growth (EFG) method, ensuring excellent material properties for a wide range of advanced applications. These tubes offer exceptional mechanical strength, high thermal stability, and unparalleled chemical inertness. With outstanding clarity and precision, they are ideal for semiconductor processing, laser systems, high-temperature applications, and scientific instrumentation.

EFG-grown sapphire tubes are made from high-purity single-crystal α-Al₂O₃ and are available in a variety of sizes and wall thicknesses to meet the demands of specialized applications. The tubes are also available with customizable dimensions and are suitable for industries where strength, optical clarity, and chemical resistance are crucial.

Parameters & Specifications:

Key Features:

1. Exceptional Material Quality
   Manufactured from ultra-pure α-Al₂O₃ single crystals, our EFG-grown sapphire tubes offer excellent optical clarity and mechanical strength. The controlled C-Plane orientation provides outstanding performance in high-precision applications.

2. Outstanding Mechanical Strength
   Sapphire tubes, with a Mohs hardness of 9, offer superior resistance to scratches and wear. They exhibit excellent compressive strength (>2 GPa) and flexural strength (600-750 MPa), making them ideal for use in high-stress environments.

3. Thermal & Chemical Resistance
   These sapphire tubes demonstrate superior thermal properties, including thermal conductivity of 30 W/m·K and resistance to temperatures from -200°C to 1,800°C. They also exhibit excellent chemical inertness, with resistance to harsh acids, alkalis, and plasma corrosion.

4. Customizable Sizes & Precision
   Our EFG-grown sapphire tubes are available in a wide range of diameters (from 5mm to 150mm) and customizable wall thicknesses (0.5mm to 20mm). The high dimensional precision ensures that the tubes meet the most stringent requirements for your applications.

5. Optical Performance
   These tubes maintain over 80% light transmittance in the visible spectrum (400-700nm), making them ideal for optical applications. Their low birefringence (<5 nm/cm) makes them especially suited for use in high-precision laser systems.

6. Efficient Production Process
   The EFG method allows for the efficient production of long sapphire tubes, providing consistent material quality across large quantities. The process ensures minimal defects and uniform wall thicknesses, with fast lead times for large-scale production.

Applications of EFG-Grown Sapphire Tubes:

1. Semiconductor Manufacturing:

   • Plasma Etching Chambers: Sapphire tubes serve as liners, offering excellent erosion resistance in plasma etching systems, increasing the lifespan of critical components.

   • Wafer Processing Observation Windows: Sapphire tubes offer high transparency and thermal resistance, allowing for clear observation during wafer processing at high temperatures.

2. Laser Systems:

   • Laser Gain Media Tubes: Ideal for excimer, CO₂, and fiber lasers, sapphire tubes offer low optical loss and high durability.

   • Beam Delivery Components: Sapphire tubes protect laser nozzles from high-power densities and ensure precision in beam delivery.

3. High-Temperature Industrial Applications:

   • Thermal Process Tubes: Used in sapphire crystal growth furnaces, they can withstand temperatures up to 2,100°C, making them ideal for high-temperature processing.

   • Molten Metal Handling: Sapphire tubes are employed as thermocouple protection tubes, offering resistance to molten metal damage.

4. Scientific Instrumentation:

   • Synchrotron Beamlines: Sapphire tubes are used in X-ray windows and monochromators, offering high transparency and radiation resistance.

   • Cryogenic Systems: Used as sample holders in low-temperature environments, sapphire tubes are effective in cryogenic research applications.

5. Medical Devices:

   • Surgical Laser Delivery Systems: Sapphire tubes are commonly used in laser surgery systems due to their durability, optical clarity, and resistance to sterilization.

   • MRI-Compatible Sensor Housings: Sapphire tubes provide mechanical strength and transparency for use in MRI-compatible devices.

FAQ:

Q1: What is the difference between EFG-grown and KY-grown sapphire tubes?
A: EFG-grown sapphire tubes are produced using the Edge-defined Film-fed Growth method, which allows for the production of longer tubes with more consistent dimensions. While both EFG and KY methods offer high purity, KY-grown tubes tend to have better optical clarity, making them ideal for high-precision optics. EFG-grown tubes, on the other hand, offer more economical production for larger sizes and are ideal for applications where cost efficiency is a concern.

Q2: What are the recommended packaging methods for EFG-grown sapphire tubes?
A: Our EFG-grown sapphire tubes are shipped with aerospace-grade packaging:

• Primary Packaging: Class 100 cleanroom vacuum-sealed bags to maintain the tubes’ purity.

• Secondary Packaging: Custom foam-insulated cases to protect the tubes from mechanical damage during transit.

Related Products:

Unpolished Sapphire Tubes​ KY Method Rough Blanks Custom Sizes