Aluminiumoxid

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Materials properties

Structure formula: Al2O3  
State: monocrystalline  
Crystal structure: hexagonal a = 4.77 Å
c = 13.04 Å
Density: 3.98 g/cm3  
Melting point: 2040°C  
Coefficient of expansion: 6.7 * 10-6/°C
5.0 * 10-6/°C		 parallel C-axis
perpendicular C-axis
Dielectrical constant (e ): 9.0
11.5		 parallel C-axis
perpendicular C-axis
Dielectrical lost (10GHz): 3 * 10-5
8.6 * 10-5		 parallel C-axis
perpendicular C-axis
Specific resistance: 1019 W/cm  
 

Substrate properties

Production method: Czochralski, HEM, Verneuil grown
Orientation: (0001), (1-102), (11-20)
Orientation accuracy: until £ 0.5°
Standard size: 10mm x 10mm x thickness 1mm or 0.5mm
Tolerance of length:

± 0.02mm

Tolerance of thickness:

± 0.02mm

Parallelness:

£ 0.3°

Polishing: one side or both sides epi-polished
Flatness:

£ 0.3µm / 10mm

Roughness of surface: Ra £ 10Å
Scratches: none
Surface quality: with light microscope without defects

Übersicht der Elemente mit Zugang zu unserem Shop

1 18
H
 2 13 14 15 16 17
He
Li Be B C
N
O
F
Ne
Na Mg 3 4 5 6 7 8 9 10 11 12 Al Si P S
Cl
Ar
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se
Br
Kr
Rb Sr Y Zr Nb Mo
Tc
 Ru Rh Pd Ag Cd In Sn Sb Te I
Xe
Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi
Po
At
Ra
Fr
Ra
Ac
Ce Pr Nd
Pm
 Sm Eu Gd Tb Dy Ho Er Tm Yb Lu


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