Alumina (Aluminum Oxide, Al2O3)

Properties

Compare
Bulk Modulus
130 to 340 GPa, or 18 to 49 106 psi
Compressive (Crushing) Strength
1900 to 2930 MPa, or 270 to 424 103 psi
Density
3.42 to 4.2 g/cm3, or 213 to 260 lb/ft3
Dielectric Strength (Breakdown Potential)
8.3 to 15 MV/m, or 210 to 380 V/mil
Elastic (Young's) Modulus
220 to 460 GPa, or 31 to 66 106 psi
Flexural Strength (MOR)
Typical
300 to 690 MPa, or 43 to 100 103 psi
Fracture Toughness
3.5 to 5.5 MPa-m1/2
Maximum Temperature
No-Load Shape Stability
1400 to 1750 °C, or 2500 to 3180 °F
Maximum Temperature
Onset of Melting (Solidus)
2040 °C, or 3700 °F
Poisson's Ratio
0.21 to 0.28
Shear Modulus
110 to 190 GPa, or 15 to 27 106 psi
Specific Heat Capacity
Conventional
760 to 885 J/kg-K
Specific Heat Capacity
Volumetric
3000 to 3700 103 J/m3-K
Speed of Sound
250 to 340 103 m/s, or 820 to 1100 103 ft/s
Stiffness-to-Weight Ratio
Bulk
38 to 87 MN-m/kg
Stiffness-to-Weight Ratio
Shear
32 to 48 MN-m/kg
Stiffness-to-Weight Ratio
Tensile
64 to 110 MN-m/kg
Strength-to-Weight Ratio
Compressive
550 to 730 kN-m/kg
Strength-to-Weight Ratio
Flexural
87 to 170 kN-m/kg
Strength-to-Weight Ratio
Tensile, Ultimate
32 to 75 kN-m/kg
Tensile Strength
Ultimate
120 to 300 MPa, or 17 to 43 103 psi
Thermal Conductivity
Ambient
16 to 31 W/m-K
Thermal Expansion
20 to 1000°C
7.2 to 8.2 µm/m-K

Only showing properties for which the substantial majority of variants have data.

See Also

Alumina as a Ceramic Material, by The American Ceramic Society, 1970 (link).


James F. Shackelford and Robert H. Doremus (editors), Ceramic and Glass Materals: Structure, Properties and Processing, 2008 (link).


Philip M. Parker, The World Market for Alumina (Aluminum Oxide) Excluding Corundum: A 2011 Global Trade Perspective, 2010 (link).


R. R. Kurkchubasche, Evaluation of Nondestructive Inspection Techniques for Quality Control of Alumina-Ceramic Housing Components, 1993 (link).

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