| Sapphire
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Chemical Formula
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Al2O3
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Physical:
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Crystallographic Structure
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Hexagonal
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Density
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3.98 gm/cc
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Melting Point
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2040°C
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Solubility
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98 x 10-6 gm/100 gm H2O
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Maximum Operating Temperature
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2000°C
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Thermal Expansion
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3.2 - 8.4 x 10-6/°C
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Optical:
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Standard Orientations
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C-Axis
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(0001)
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A-Axis
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(1120)
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M-Axis
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(1010)
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R-Axis
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(1102)
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Lattice Constant
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a = 4.758 Å
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c = 12.991 Å
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Dielectric Constant
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10.6 parallel to C axis at 300 mHz
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8.6 perpendicular to C axis at 300 mHz
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Optical Transmission Range
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0.15 - 5.5 microns
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Refractive Index
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1.755 at 1.0139 microns
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- 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
Manufactured by Atomergic Chemetals.
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