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Ensinger PEI

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CoorsTek AD-90 Alumina (nom. 90% Al2O3)
Categories: Ceramic; Oxide; Aluminum Oxide

Material Notes: Thermal Shock Delta Tc = 250°C - Thermal shock tests are performed by quenching samples in water from different elevated temperatures. Delta Tc is the change in temperature which results in a sharp decrease in the flexural strength of the sample.

Data Provided by the manufacturer, Coors Ceramics Co.

Key Words: Al2O3; aluminum oxide, alumina
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Physical PropertiesOriginal ValueComments
Density 3.60 g/ccASTM C20
Water Absorption 0.00 %ASTM C373
Particle Size 4.0 µmAverage Crystal Size - Thin Section Test
 
Mechanical PropertiesOriginal ValueComments
Knoop Microhardness 10.41000 g load
Hardness, Rockwell 45 N 75GPa
Tensile Strength, Ultimate 221 MPaACMA Test #4
Modulus of Elasticity 276 GPaASTM C848
Flexural Strength 338 MPaASTM F417
Compressive Strength 2482 MPaASTM C773
Poissons Ratio 0.22ASTM C848
Fracture Toughness 3.00 - 4.00 MPa-m½Notched Beam
Shear Modulus 113 GPaCalculated
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity >= 1.00e+14 ohm-cmASTM D1829
 500000 ohm-cm
@Temperature 1000 °C
ASTM D1829
 4.00e+8 ohm-cm
@Temperature 500 °C
ASTM D1829
Dielectric Constant 8.8
@Frequency 1e+6 Hz
Dielectric Strength 8.30 kV/mmac; ASTM D116
Dielectric Loss Index 0.00040
@Frequency 1e+6 Hz
ASTM D2520
 
Thermal PropertiesOriginal ValueComments
CTE, linear 8.10 µm/m-°C
@Temperature 25.0 - 1000 °C
ASTM C372
Specific Heat Capacity 0.920 J/g-°CASTM E1269
Thermal Conductivity 16.7 W/m-KASTM C408
Maximum Service Temperature, Air 1500 °CNo Load
 
Component Elements PropertiesOriginal ValueComments
Al2O3 90 %
 
Descriptive Properties
ColorWhite

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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CA7B / 377

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