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Sapphire crystal substrate has good thermal characteristics, excellent electrical and dielectric properties, and is resistant to chemical corrosion. It is resistant to high temperatures and has good thermal conductivity, high hardness, infrared transmission, and chemical stability. It is widely used in high-temperature resistant infrared window materials, III-V nitrides, and various epitaxial film substrate materials.
|
Crystal Class |
Hexagonal system |
|
Lattice Constants |
a=4.785, c=12.991 |
|
Density |
3.98g/cm3 |
|
Melting Point |
2040 °C |
|
Hardness |
9（mohs） |
|
Elastic Coefficient |
C11= 495; C12=160; C33= 497; C44= 146; C13= 115; C14= 23 GPa |
|
Thermal Conductivity |
46.06 @ 0?oC, 25.12 @ 100?oC, 12.56 @ 400?oC ( W/(m.K)?) |
|
Thermal?Expansion |
7.5 x 10-6 /℃ |
|
Standard Orientation |
<0001>、<11-20>、<1-102>、<10-10>±0.2? |
|
Standard Size |
?5x5mm, 10x10mm, Dia1"(25.4mm), Dia2"(50.8mm) Or customized. |
|
Standard Thickness |
0.5mm, 1.0mm, 2.0mm, 5.0mm |
|
Dielectric Constant |
[email protected]?300K at [email protected]?300K at C-axis |
|
Polishing |
Single side polished or Double side polished |
Sapphire Crystal Substrates are used in the following applications:
- Sapphire substrates: IR Detectors; microwave integrated circuits;
- Aerospace: withstand high heat, windows, countermeasures lamps;
- Medical: surgical systems, contact tips for various surgical laser applications, endoscope lenses;
- Watch industry.
