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Groupe Arnaud Electronics

Sapphire

Chemical Formula

 

Al2O3

     

Physical:

   

Crystallographic Structure

 

Hexagonal

Density

 

3.98 gm/cc

Melting Point

 

2040°C

Solubility

 

98 x 10-6 gm/100 gm H2O

Maximum Operating Temperature

 

2000°C

Thermal Expansion

 

3.2 - 8.4 x 10-6/°C

     

Optical:

   

Standard Orientations

   
  C-Axis

(0001)

  A-Axis

(1120)

  M-Axis

(1010)

  R-Axis

(1102)

Lattice Constant

 

a = 4.758 Å

   

c = 12.991 Å

Dielectric Constant

 

10.6 parallel to C axis at 300 mHz

   

8.6 perpendicular to C axis at 300 mHz

Optical Transmission Range

 

0.15 - 5.5 microns

Refractive Index

 

1.755 at 1.0139 microns

sapphire properties

  • Sapphire is a most useful material for harsh environmental applications.
  • Excellent quality of hardness, high strength and chemical stability.
Protective Windows:

Standard or UV Stable
Maximum Diameter: 8 inch
Minimum Diameter: 0.25 inch
Minimum Thickness: 0.33 mm
Finish (S/D): 80/50, 60/40 maximum
Typical Usage: gas, temperature and pressure meter windows

Scanner Windows:

Size: 8 " x 1.5 " or 6 " x 6
Minimum Thickness: 0.33 mm
Finish (S/D): 80/50 or 60/40

Optical Substrates, Epi Growth Substrates and Electro-Optical Units

Wedges:
Max. and Min. Wedge Angle: 15 minute to 60 degrees
Maximum Diameter: 4 inch
Finish (S/D): 80/50 or 60/40

Optical and Mechanical Rods, Plates and Parts

Wafer Carriers:
Sizes: 1", 2", 3"and 4"diameter
Thickness: 0.33 mm, 0.45- 0.5 mm, 1 mm

Rods:
Diameters: up to 30 mm
Lengths: up to 300 mm
Tolerances: (standard) 0.05 mm
Produced by EFG Growth Process

Tubes:
Outside Diameter: up to 40 mm
Inside Diameter: over 0.8 mm
Lengths: up to 300 mm

Fast Quotation



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