Customizable Sapphire Tubes EFG Method, 10mm–100mm Polished

Our EFG-grown sapphire tubes represent a breakthrough in high-performance ceramic tubing, combining exceptional material purity with cost-effective manufacturing. Utilizing the Edge-defined Film-fed Growth (EFG) method, these single-crystal α-Al₂O₃ tubes are available from 10mm to 100mm with optical-grade polishing (Ra <0.02μm). The EFG process enables production of longer tube lengths (up to 1500mm) compared to KY methods, while maintaining excellent mechanical strength and thermal stability. These tubes are particularly suited for industrial applications requiring large-size, high-quality sapphire components at competitive prices.

With transmission >85% across 200-5500nm wavelength range and thermal stability up to 1900°C in inert atmospheres, our EFG sapphire tubes outperform quartz and polycrystalline alumina in nearly all demanding environments. The unique capillary growth mechanism of EFG allows for precise control of wall thickness (1-25mm) and produces tubes with superior dimensional consistency compared to conventional growth methods.

Key Features

1. Manufacturing Advantages

• Continuous Growth Process: Enables production of long, seamless tubes (up to 1500mm)
• Near-net Shape: Reduces material waste and machining costs
• Dimensional Consistency: ±0.05mm ID/OD tolerance standard
• High Yield Production: Cost-effective for large quantity orders

2. Material Excellence

• Single Crystal Structure: >99.99% pure α-Al₂O₃
• Low Defect Density: <50 defects/cm² by etch pit testing
• Controlled Orientation: C (0001) standard, other orientations available

3. Surface Quality Options

• Standard Polish: Ra <0.02μm (optical grade)
• Super Polish: Ra <0.005μm (laser grade)
• As-grown Surface: Ra 0.1-0.3μm (industrial applications)

4. Thermal Performance

• Thermal Conductivity: 35 W/m·K at 25°C
• Thermal Shock Resistance: Withstands ΔT >400°C
• Max Operating Temp: 1900°C (inert), 1200°C (oxidizing)

5. Mechanical Properties

• Flexural Strength: 550-700 MPa
• Compressive Strength: >2.2 GPa
• Young's Modulus: 390 GPa

Applications

1. Industrial High-Temperature

• Thermocouple Protection Tubes: For molten metal temperature measurement
• Industrial Furnace Viewports: Resists thermal cycling and chemical attack
• Crystal Growth Crucibles: For sapphire, silicon, and compound semiconductors

2. Semiconductor Equipment

• Plasma Etch Components: Erosion-resistant liners for dielectric etchers
• CVD Reactor Tubes: For SiC and GaN epitaxial growth systems
• Diffusion Furnace Components: High-purity process tubes

3. Lighting & Display

• LED Manufacturing: MOCVD reactor components
• High-intensity Lamp Tubes: UV-transmissive envelopes
• Projection System Components: High-temperature light guides

4. Scientific Research

• High-pressure Cells: Windows for diamond anvil cells
• Synchrotron Beamline Components: X-ray optics and windows
• Laser Experiment Chambers: For high-power laser research

5. Medical Technology

• Surgical Laser Delivery: Endoscopic components
• Medical Imaging: MRI-compatible sensor housings
• Dental Equipment: Sterilizable instrument components

Specifications

1. Dimensions Properties

2. Material Properties

3. Mechanical Properties

FAQ

Q1: How does EFG compare to KY sapphire tubes?

• EFG Advantages: Longer lengths (1500mm vs 500mm), better dimensional consistency, lower cost
• KY Advantages: Slightly better optical quality, no growth seams

Q2:  What is the lead time for custom sizes?

• Standard sizes: 4-6 weeks
• Custom sizes: 8-10 weeks
• Rush service available (+25% fee)

Q3: How does sapphire compare to quartz for high temp applications?