Al2O3
Sapphire (white sapphire, Al2O3) single crystal is an excellent multifunctional material. It has high temperature resistance, good thermal conductivity, high hardness, infrared transmission and good chemical stability. It is widely used in many fields of industry, national defense and scientific research (such as high-temperature infrared windows, etc.). At the same time, it is also a widely used single crystal substrate material, and it is the first choice for the blue, violet, and white light emitting diode (LED) and blue laser (LD) industries. And it is also an important superconducting film substrate. In addition to making Y-series, La-series and other high-temperature superconducting films, it can also be used to grow new practical MgB2 superconducting films.
CasCrysTech (CCT) provides high quality sapphire( Al2O3) crystal which can be customized upon customer's requirements.
Uses/Applications
It is widely used in many fields of industry, national defense and scientific research (such as high-temperature infrared windows, etc.).
It is also a widely used single crystal substrate material, and it is the first choice for the blue, violet, and white light emitting diode (LED) and blue laser (LD) industries.
It is also an important superconducting film substrate.
Features/Benefits
It has high temperature resistance, good thermal conductivity, high hardness, infrared transmission and good chemical stability.
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Crystal Structure
Hexagonal
Lattice Constant
a=4.748Å, c=12.97Å
Density
3.98 (g/cm3)
Melt Point
2040℃
Growth Method
Czochralski, Kyropoulos
Mohs Hardness
9（mohs）
Refractive Index
300K ∥c，1.762 @630nm
⊥c，1.770 @630nm
Thermal Expansion
5.8 ×10-6/K
Thermal Conductivity（W/mK)）
⊥c
//c
23℃, 55
26℃, 60
77℃ ,40
70℃, 41
Loss Tangent at 293K
1×10-4（1MHz）
Dielectric Constant at 103-109Hz @25℃
∥c，11.5
⊥c，9.3
Transmittance
80％@ 400~4000nm
Orientation
A-plane
<11-20>
2.379 Å
R-plane
<1-102>
1.740 Å
M-plane
<10-10>
1.375 Å
C-plane
<0001>
2.165 Å
Crystallographic Orientation Tolerance
±0.5°
Regular Size and Tolerance
10×3mm,10×5mm，10×10mm,15×15mm，20×15mm，20×20mm
Regular Thickness and Tolerance
0.5mm，1.0mm
Polishing
One side or two sides
Surface Roughness
Ra<5Å（5×5μm）
Package
Class 100 clean bag, Class 1000 super clean room
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Regular Size and Tolerance
10×3mm,10×5mm，10×10mm,15×15mm，20×15mm，20×20mm
Regular Thickness and Tolerance
0.5mm，1.0mm