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Rulon Bearings

CoorsTek PlasmaPure-UC™ 99.9% Alumina
Categories: Ceramic; Oxide; Aluminum Oxide

Key Words: Al2O3
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Physical PropertiesMetricEnglishComments
Density 3.94 g/cc0.142 lb/in³ASTM-C 20
Particle Size 3.0 µm3.0 µmAverage Crystal Size; THIN-SECTION
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell 45 N 8585
Modulus of Elasticity 386 GPa56000 ksiASTM-C848
Flexural Strength 414 MPa60000 psiMOR; ASTM-F417
Compressive Strength 2930 MPa425000 psiASTM-C773
Poissons Ratio 0.240.24ASTM-C848
Fracture Toughness 4.00 - 5.00 MPa-m½3.64 - 4.55 ksi-in½KIC; Notched Beam
Shear Modulus 156 GPa22600 ksiCalculated
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity  1.10e+7 ohm-cm
@Temperature 1000 °C
1.10e+7 ohm-cm
@Temperature 1830 °F
ASTM-D1829
 3.30e+12 ohm-cm
@Temperature 500 °C
3.30e+12 ohm-cm
@Temperature 932 °F
ASTM-D1829
 >= 1.00e+14 ohm-cm
@Temperature 25.0 °C
>= 1.00e+14 ohm-cm
@Temperature 77.0 °F
ASTM-D1829
 
Thermal PropertiesMetricEnglishComments
CTE, linear 8.20 µm/m-°C
@Temperature 25.0 - 1000 °C
4.56 µin/in-°F
@Temperature 77.0 - 1830 °F
ASTM-C372
Thermal Conductivity 31.0 W/m-K215 BTU-in/hr-ft²-°FASTM-C408
Maximum Service Temperature, Air 1750 °C3180 °FNO-LOAD COND.
 
Component Elements PropertiesMetricEnglishComments
Al2O3 >= 99.9 %>= 99.9 %
 
Descriptive Properties
ColorIvory
Thermal Shock Resistance (°C)200 ΔTc

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