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Stock List Crystals & Substrates

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SurfaceNet GmbH Germany (Crystals, Substrates, Service)
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Aluminium Oxide ( ά? -Al2O3 )

 

Aluminium Oxide, SurfaceNet GmbH Germany

Aluminium Oxide, SurfaceNet GmbH Germany

Aluminium oxid-rubin, SurfaceNet GmbH Germany

Aluminium oxid: Al2O3-Cr,
Al2O3-Flux, Al2O3-Cr Flux

Aluminium oxid: Al2O3 Korundum
and Ruby - Crystals

Aluminium oxid: Al2O3 : Cr
Ruby rod

 

Aluminium oxid Al2O3

Aluminium oxid Al2O3

 

LEDs, SurfaceNet GmbH

Crystal properties

Crystal growth method

Czochralski, HEM,Verneuil

Crystal growth orientation

(0 001),(1102),(1012),(1010)

Maximum size

7 inch diameter

Variations

Doped crystals (Fe, Nb, Ti, W,Ta,V,Cr)
Other dopands on request 

Crystallographic properties

Hexagonal / Rhombohedric

Crystallographic structure

a = 4.77 A
c = 13.04 A
a : c = 1 : 2.734

a =   4.758
c = 12.991

Mineralogical synonyms

 Sapphire, Corundum

Twinning structure

Twinfree

Colour

 Colourless

Density

3.98 g/cm3

Melting point

2052  C

Hardnes

9   (Mohs)

Thermal  expansion coefficient

5.4 * 10_6 K_1 
6.2 * 10_6 K_1

|| c-axis
^ c-axis 

RT
RT

Dielectric  constant

9.4
11.5

| c-axis
^ c-axis

RT
RT

 

Physical properties cont.

Dielectric loss tangent (10GHz)

3.0 * 10_5
8.6 * 10_5

| | c-axis
^ c-axis

RT
RT

Dielectric constant:

1016 W/cm

RT

 

Optical properties

Transmission range

0.2 to 6.0 mm

 

Refraction index:

nd = 1.8336 
nd = 1.58638 

at 265 nm
 at 5.6 mm

Dispersion

 0.011

 

 

Standard orientations

(0001),(1102),(1012),(1010)

Other orientations on request

 

List of  Refractive index, ordinary ray at 24 C (Al2O3)

Optical properties  refraction index Aluminium oxide

Wavelength (m)

Refractive index 

0,28035

1,8243

0,289036

1,8195

0,29673

1,8159

0,30215

1,8135

0,31300

1,8091

0,33415

1,8018

0,34662

1,7981

0,36105

1,7945

0,36501

1,7936

0,39064

1,7883

0,40466

1,7858

0,43583

1,7812

0,54607

1,7708

0,57696

1,7688

0,57907

1,7687

0,64385

1,7655

0,70652

1,7630

0,85212

1,7588

0,89440

1,7579

1,01398

1,7555

1,12866

1,7534

1,36728

1,7494

1,39506

1,7489

1,52952

1,7466

1,69320

1,7437

1,70913

1,7434

1.81307

1,7414

1.97010

1,7383

2,15260

1,7344

2,24929

1,7323

2,32542

1,7306

2,43740

1,7278

3,24320

1,7044

3,26660

1,7036

3,30300

1,7023

3,29300

1,7015

3,41880

1,6982

3,50780

1,6950

3,70000

1,6875

4,25800

1,6637

4,95400

1,6266

5,14560

1,6151

5,34900

1,6020

5,41900

1,5973

5,577

1,5864

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