Overview - Alumina, 96%, Al2O3
Categories: Ceramic; Oxide; Aluminum Oxide
Material Notes: Information below is typical for commercially available 96% alumina. A wide variation of properties is possible between specific grades.
Key Words: Alpha alumina, Al2O3, aluminum oxide, corundum, aluminium oxide
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Physical PropertiesMetricEnglishComments
Density 3.80 g/cc0.137 lb/in³
Water Absorption 0.00 %0.00 %
Weibull Modulus >= 10>= 10
 
Mechanical PropertiesMetricEnglishComments
Hardness, Mohs 9.09.0
Tensile Strength, Ultimate 200 MPa29000 psi
Modulus of Elasticity 300 GPa43500 ksi
Flexural Strength 320 MPa46400 psi
Compressive Strength 2400 MPa348000 psi
Poissons Ratio 0.220.22
Fracture Toughness 4.50 MPa-m½4.10 ksi-in½
Shear Modulus 130 GPa18900 ksi
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 1.00e+14 ohm-cm1.00e+14 ohm-cm
Dielectric Constant 9.39.3
Dielectric Strength 9.00 kV/mm229 kV/inWide Variation Between Grades
 
Thermal PropertiesMetricEnglishComments
CTE, linear  6.40 µm/m-°C
@Temperature 20.0 - 300 °C		3.56 µin/in-°F
@Temperature 68.0 - 572 °F
 7.60 µm/m-°C
@Temperature 20.0 - 700 °C		4.22 µin/in-°F
@Temperature 68.0 - 1290 °F
 8.00 µm/m-°C
@Temperature 20.0 - 1000 °C		4.44 µin/in-°F
@Temperature 68.0 - 1830 °F
Specific Heat Capacity 0.880 J/g-°C0.210 BTU/lb-°F
Thermal Conductivity 25.0 W/m-K174 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air 1575 °C2867 °FNo Load
 
Component Elements PropertiesMetricEnglishComments
Al2O3 96 %96 %
 
Descriptive Properties
ColorWhite to Ivory/Brown/Pink

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