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CM4068 Sapphire Tube, Al2O3

Catalog No. CM4068
Material Sapphire (Al2O3)
Crystal System Hexagonal
Density 3.97 g/cm3
Size Customized

 Tube Descriptions

Sapphire TubeSapphire Tube is a transparent single-crystal alumina material, which has excellent chemical stability and excellent mechanical, thermal, and optical properties. As raw materials, its performance is much better than glass, quartz and other mass-produced transparent materials.

Sapphire Tube Specifications

Item Unit Typical Values
Crystal Structure Hexagonal
Density g/cm3 3.97
Physical Properties
Poisson's Ratio 0.18~0.29
Vickers Hardness Gpa 22.5
Young's Modulus Gpa 470
Flexural Strength MPa 690
Tensile Strength Mpa 2250
Compressive Strength MPa 2940
The Thermodynamic Property
Melting Point ºC 2053
Thermal Conductivity at 20℃ W/m•k 42
CLTE 40-400℃ 10-6/℃ 7.0
Specific Heat Capacity J/(g・K) 0.75
Electrical Property
Dielectric Strength MV/m 48
Dielectric Constant at 20℃ MHz 9.3
Dielectric Loss at 20℃ MHz <1>-4
Volume Resistivity at 20℃ Ω•cm >1.0×1014
Volume Resistivity at 500℃ Ω•cm 1.0×1011
Index of Reflection
589nm No=1.768 Ne=1.760

Sapphire Tube Features

-High Strength, High Rigidity, High Anti-Abrasion, High Anti-Heat, High AntiCorrosion Characteristics, and High Anti-Plasma Characteristics.

Because of these characteristics, Single Crystal Sapphire is widely used for precision mechanical parts.

-Stable Dielectric Constant, Very Low Dielectric Loss, Good Electrical Insulation.

Single Crystal Sapphire is used as a material for substrates in super-high frequency regions. It is also used as an insulation material and microwave window. Single Crystal Sapphire has become indispensable in the Electronics Industries.

-Excellent Light Transmission.

Single Crystal Sapphire is used for various kinds of vacuum equipment, windows in reaction furnace, scanner windows and caps for optical communication due to its excellent mechanical characteristics and heat resistance.

-Good Thermal Conductivity and High Heat Resistance.

Excellent thermal conductivity at low temperatures allows Single Crystal Sapphire as a transparent material to be used in many diverse fields requiring thermal conduction and heat radiation.

Sapphire Tube Applications

(1)High Brightness LED

(2)HB-LED Semiconductor, Piezoelectric Semiconductor, Superconductor, Thin Film Substrate.

(3)MR Sensor, Precision Resistor

(4)Optical Devices

(5) Thin Film HICO

Single Crystal Sapphire is a widely used substrate material for blue, green, ultraviolet and white LEDs. It has excellent features as a base substrate for GaN deposition and great mass-productivity. In addition, it can meet future larger-size demand.

Single Crystal Sapphire is used as a base substrate in thin film deposition because its lattice alignment matches a variety of semiconductor materials combined with excellent thermal and chemical stability.

Sapphire Tube Packaging

ACM’s Sapphire Tube is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.


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