Sapphire Disc 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 Disc 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 Disc 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 Disc 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 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 of its lattice alignment match with a variety of semiconductor materials combined with excellent thermal and chemical stability.
Sapphire Disc Packaging
SAM’s Sapphire Disc is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.
Sapphire Disc FAQs
Q1: What is a Sapphire Disc?
A sapphire disc is a flat, circular piece made from synthetic sapphire (aluminum oxide, Al₂O₃). Sapphire discs are prized for their exceptional hardness, optical clarity, thermal stability, and chemical resistance, making them suitable for various high-performance applications.
Q2: How should Sapphire Discs be cleaned and maintained?
Cleaning: Clean with non-abrasive cleaners and soft cloths to avoid scratching. Ultrasonic cleaning can be used for thorough cleaning.
Maintenance: Regularly inspect for damage or contamination. Store in a clean, dry environment to prevent dust and other contaminants.
Q3: Are Sapphire Discs customizable?
Yes, sapphire discs can be customized to meet specific requirements, including different sizes, shapes, and thicknesses. Custom optical coatings and finishes can also be applied to enhance performance for specific applications.
