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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)
Packing
Class 100 Clean bag at class 1000 clean room

 

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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