Single crystal sapphire possesses excellent optical, physical and chemical properties. It is the hardest oxide crystal, maintaining high strength and chemical resistance at high temperatures. It also features a wide transmission wavelength range, excellent electrical insulation, and good thermal conductivity at low temperatures.

Why Choose Single Crystal Sapphire Tubes?

These qualities make sapphire an essential material in cutting-edge industries where durability, precision and resistance to extreme conditions are required. Sapphire tubes are widely used in:

Aerospace and defense
Medical and biotechnology
Semiconductor and electronics
Optical and laser applications
Chemical and industrial processing
Energy and scientific research

The Introduction of KY Methods Sapphire Tubes

The Kyropoulos method (KY method) is a bulk crystal growth technique used to obtain single crystals. Its largest application is growing large boules of single crystal sapphire used for:

Substrates for gallium nitride-based LEDs
Durable optical materials

Key advantages include technical simplicity, ability to grow large crystals (≥30 cm), and low dislocation density. This method is used globally to produce sapphire for electronics and optics industries.

Advantages and Specifications of ZMSH Sapphire Tubes

Extreme Hardness: Second only to diamond on the Mohs hardness scale
High-Temperature Resistance: Withstands temperatures exceeding 2,000°C
Chemical Inertness: Resistant to acids, alkalis, and corrosive environments
Optical Transparency: High transmission from UV to IR wavelengths
High Strength and Durability: Maintains integrity under extreme pressure
Excellent Electrical Insulation: Ideal for electrical and semiconductor applications

Features	Description
Chemical Formula	Al₂O₃ (aluminum oxide)
Hardness	9 Moh's
Class	Hexagonal-scalenohedral
Melting Point	2053°C (3727°F)
Maximum Useful Temperature	2000°C
Surface Quality	80/50, 60/40, 40/20, 20/10 (Scratch/Dig)
Axis Orientation	C-Axis (C-Plane), M-Plane, A-Plane, R-Plane and Random
Young's Modulus	435 GPa
Tensile Strength	275 MPa to 400 MPa
Flexural Strength	480 MPa to 895 MPa
Modulus of Rigidity	175 GPa
Density	3.97 g/cm³
Transmission Range	190nm to 5 microns
Poisson's Ratio	0.27 - 0.30
Abbe Number (νd)	72.24
Dimension Tolerance	± 0.1mm
Thickness Tolerance	± 0.01-0.10mm

About ZMSH

ZMSH is a high-tech enterprise specializing in research, production, processing, and sales of semiconductor substrates and optical crystal materials. Our products are widely used in:

Semiconductor and optical electronics
Consumer electronics
Military industry
Laser and optical communication fields

We produce various sapphire components including optical windows, LED substrates, prisms, rods, tubes, balls, laser sticks, and special components. Our products are exported globally to Europe, South Asia, USA, and other developed regions.

High Purity Polished Sapphire Tube EFG Ky Method Optical Grade Al2O3 Crystal KY Method Sapphire Tube Al2O3 Single Crystal with Wide Transmission Wavelength Range Customizable Size and Chemical Inertness 1

Frequently Asked Questions

Q: What is a sapphire tube?

A: A sapphire tube is a hollow cylindrical component made from single-crystal aluminum oxide (Al₂O₃) -- the same material as sapphire gemstones, but grown synthetically for industrial and scientific use. Because of its exceptional hardness, transparency, chemical resistance, and thermal stability, a sapphire tube is used in optical, mechanical, and high-temperature applications where traditional glass or quartz tubes would fail.

Q: Why is sapphire so expensive?

A: Sapphire is expensive because it is difficult to grow, hard to machine, and must meet extremely high purity and optical standards. Its superior durability, heat resistance, and optical performance make it indispensable in advanced technologies -- justifying its cost.

Q: What's the difference between EFG and Ky sapphire tubes?

A: EFG tubes are grown directly into tubular shapes, offering cost efficiency and long lengths. Ky tubes are machined from boules, offering better crystal consistency and are preferred for precision-demanding applications.

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