Sapphire Rod Descriptions
Sapphire 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 Rod 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
|
<1.4x10-4
|
|
Volume Resistivity at 20℃
|
Ω•cm
|
>1.0x1014
|
|
Volume Resistivity at 500℃
|
Ω•cm
|
1.0x1011
|
|
Index of Reflection
|
|
589nm
|
No=1.768
|
Ne=1.760
|
Sapphire Rod 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 Rod 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 Rod Packaging
SAM’s Sapphire Rod is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.
Sapphire Rod FAQs
Q1. What is a Sapphire Rod?
A sapphire rod is a cylindrical piece of synthetic sapphire, prized for its exceptional hardness, optical clarity, and resistance to high temperatures and chemicals. Sapphire rods are used in various high-precision and high-durability applications.
Q2. How are Sapphire Rods manufactured?
Sapphire rods are typically manufactured through:
Kyropoulos Method: Produces large, high-quality sapphire crystals from which rods can be machined.
Czochralski Process: Involves pulling a sapphire crystal from a molten alumina bath and then processing it into rods.
Precision Machining: The sapphire crystal is ground and polished to achieve the desired dimensions and surface finish.
Q3. Can Sapphire Rods be customized?
Yes, sapphire rods can be customized to meet specific requirements, including different diameters, lengths, and surface finishes. Customization can also include features like drilled holes, notches, and specific optical coatings.
