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MarkeTech Sapphire (Aluminum Oxide - Al2O3) Single Crystal

Category Ceramic , Oxide , Aluminum Oxide
Manufacturer MarkeTech
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF MarkeTech Sapphire (Aluminum Oxide - Al2O3) Single Crystal.pdf
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Material Notes:
Data provided by the supplier, MarkeTech International.Sapphire is grown by several methods: Boule form (Czochralski), in plate form, or as tubes, rods and plates. Boules are grown up to 8" diameter and 6" long. Plates can be formed up to 12" square and 1" thick. Rods and tubes can be grown up to 72" long.Sapphire is characterized by its high hardness (next to diamond on the Mohs scale), chemical and thermal stability, high application temperature, and transparency in the IR range. It is widely used as windows for instruments, high temperature parts, and wear resistance.Also used for deposition of III-V nitrides for LEDs, Lasers, etc. Standard orientation: ; GaN Lattice Mismatch 14%.MatWeb lists a large selection of polycrystalline aluminum oxides.
Physical Properties Metric English Comments
Density 3.98 g/cc
0.144 lb/in³
Water Absorption 0.0 %
0.0 %
Solubility in Water 0.0 %
0.0 %
a Lattice Constant 4.765 Ã…
4.765 Ã…
c Lattice Constant 13.000 Ã…
13.000 Ã…
Molecular Weight 101.96 g/mol
101.96 g/mol
Mechanical Properties Metric English Comments
Knoop Microhardness 1800
1800
parallel to c-axis
2200
2200
perpendicular to c-axis
Hardness, Mohs 9
9
Tensile Strength 275 MPa

@Temperature 600 °C
 39900 psi

@Temperature 1110 °F
345 MPa

@Temperature 1000 °C
 50000 psi

@Temperature 1830 °F
400 MPa

@Temperature 25.0 °C
 58000 psi

@Temperature 77.0 °F
Modulus of Elasticity 345 GPa
50000 ksi
60° to C-axis
352 GPa
51100 ksi
45° to C-axis
379 GPa
55000 ksi
30° to C-axis
386 GPa
56000 ksi
75° to C-axis
Modulus of Rupture 0.350 - 0.690 GPa
50.8 - 100 ksi
Flexural Strength 2500 - 4000 MPa
363000 - 580000 psi
Bulk Modulus 240 GPa
34800 ksi
Poissons Ratio 0.25 - 0.30
0.25 - 0.30
Coefficient of Friction 0.10
0.10
vs. self
0.15
0.15
vs. steel
Thermal Properties Metric English Comments
CTE, linear 5.00 µm/m-°C

@Temperature 50.0 °C
 2.78 µin/in-°F

@Temperature 122 °F
 perpendicular to optical axis
6.67 µm/m-°C

@Temperature 50.0 °C
 3.71 µin/in-°F

@Temperature 122 °F
 parallel to optical axis
8.31 µm/m-°C

@Temperature 20.0 - 1000 °C
 4.62 µin/in-°F

@Temperature 68.0 - 1830 °F
 perpendicular to optical axis
8.40 µm/m-°C

@Temperature 20.0 - 1000 °C
 4.67 µin/in-°F

@Temperature 68.0 - 1830 °F
 60° to c-axis
9.03 µm/m-°C

@Temperature 20.0 - 1000 °C
 5.02 µin/in-°F

@Temperature 68.0 - 1830 °F
 parallel to c-axis
Specific Heat Capacity 0.105 J/g-°C

@Temperature -182 °C
 0.0251 BTU/lb-°F

@Temperature -296 °F
0.761 J/g-°C

@Temperature 17.9 °C
 0.182 BTU/lb-°F

@Temperature 64.1 °F
Thermal Conductivity 23.1 W/m-K
160 BTU-in/hr-ft²-°F
perpendicular to c-axis
25.2 W/m-K
175 BTU-in/hr-ft²-°F
parallel to c-axis
Melting Point 2040 °C
3700 °F
Maximum Service Temperature, Air 1800 °C
3270 °F
Optical Properties Metric English Comments
Refractive Index 1.586

@Wavelength 5777 nm
 1.586

@Wavelength 5777 nm
1.633

@Wavelength 4255.3 nm
 1.633

@Wavelength 4255.3 nm
1.702

@Wavelength 3032.6 nm
 1.702

@Wavelength 3032.6 nm
1.732

@Wavelength 2249.2 nm
 1.732

@Wavelength 2249.2 nm
1.743

@Wavelength 1693.2 nm
 1.743

@Wavelength 1693.2 nm
1.753

@Wavelength 1128.6 nm
 1.753

@Wavelength 1128.6 nm
1.755

@Wavelength 1013.9 nm
 1.755

@Wavelength 1013.9 nm
1.757

@Wavelength 894.4 nm
 1.757

@Wavelength 894.4 nm
1.763

@Wavelength 706.5 nm
 1.763

@Wavelength 706.5 nm
1.765

@Wavelength 579.0 nm
 1.765

@Wavelength 579.0 nm
1.770

@Wavelength 546.0 nm
 1.770

@Wavelength 546.0 nm
1.785

@Wavelength 404.6 nm
 1.785

@Wavelength 404.6 nm
1.793

@Wavelength 365.0 nm
 1.793

@Wavelength 365.0 nm
1.798

@Wavelength 346.6 nm
 1.798

@Wavelength 346.6 nm
1.809

@Wavelength 313.0 nm
 1.809

@Wavelength 313.0 nm
1.824

@Wavelength 280 nm
 1.824

@Wavelength 280 nm
1.833

@Wavelength 265 nm
 1.833

@Wavelength 265 nm
Transmission, Visible 85 %

@Wavelength 380 - 700 nm,
Thickness 1.00 mm
 85 %

@Wavelength 380 - 700 nm,
Thickness 0.0394 in
 Visible
IR Transmittance 70 %

@Thickness 1.00 mm,
Wavelength 5500 nm
 70 %

@Thickness 0.0394 in,
Wavelength 5500 nm
85 %

@Wavelength 750 - 5000 nm,
Thickness 1.00 mm
 85 %

@Wavelength 750 - 5000 nm,
Thickness 0.0394 in
UV Transmittance 50 %

@Thickness 1.00 mm,
Wavelength 200 nm
 50 %

@Thickness 0.0394 in,
Wavelength 200 nm
60 %

@Thickness 1.00 mm,
Wavelength 280 nm
 60 %

@Thickness 0.0394 in,
Wavelength 280 nm
80 %

@Wavelength 300 - 400 nm,
Thickness 1.00 mm
 80 %

@Wavelength 300 - 400 nm,
Thickness 0.0394 in
Reflection Coefficient, Visible (0-1) 0.14

@Wavelength 1000 nm
 0.14

@Wavelength 1000 nm
 reflection loss, 2 surfaces
Electrical Properties Metric English Comments
Electrical Resistivity 1.00e+11 - 1.00e+16 ohm-cm

@Temperature 20.0 - 500 °C
 1.00e+11 - 1.00e+16 ohm-cm

@Temperature 68.0 - 932 °F
Dielectric Constant 9.4
9.4
perpendicular to c-axis
11.5
11.5
parallel to c-axis
Dielectric Strength 4.00 kV/mm
102 kV/in
Dissipation Factor 0.0001
0.0001
Descriptive Properties Value Comments
Crystal Structure Hexagonal
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