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Al2O3 substrate

Al2O3 substrate

Click here for:  Alumina(Al2O3) ceramic substrate

 

Major capability parameter
Crystal Structure
Hexagonal system
Lattice Constant
a=4.748Å  c=12.97Å
Density
3.98(g/cm3)
Melting Point
2040℃
Mohs Hardness
9
Coefficient of Thermal expansion
7.5  (x10-6/ oC)
Thermal conductivity
 
⊥c
//c
23℃
0.055
26℃ 0.060
77℃
0.040
70℃ 0.041
Dielectric constant
~ 9.4 @300K  at A axis ~ 11.58@ 300K at C axis
Crystal orientation
A-plane
<11-20>
2.379A
R-plane
<1-102>
1.740A
M-plane
<10-10>
1.375A
C-plane
<0001>
2.165A
Orientation Tolerance
±0.5°
Standard Size (mm)
10×3,10×5,10×10,15×15,20×15,20×20,
Diameter 2"(25.4mm), 3"(76.2mm), 4"(100mm), 6"(150mm)
Standard Thickness
0.43mm,0.5mm,0.65mm,1.0mm
Polished
Single side or double side polished
Surface roughness
Ra<5Å(5×5μm)
 
 

 

Sapphire crystal has good thermal properties, excellent electrical properties and dielectric properties, And good thermostability, Thermal conductivity, Infrared permeability, chemical stability, High hardness, anti-chemical corrosion,  Sapphire,Al2O3 are widely used in industrial, national defense and scientific research (such as high-temperature infrared windows, etc.). It is also a extensive use in monocrystalline substrate material.

 
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