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Rulon Bearings

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CeramTec Rubalit® HSS Alumina, 75% (High Strength Substrate)
Categories: Ceramic; Oxide; Aluminum Oxide

Material Notes: Rubalit® HSS (High Strength Substrate) displays the successful union of elasticity and strength. The ultrafine microstructure of Rubalit® HSS is the basis for its outstanding substrate surface quality. A high and consistent surface quality allows for the scale of integration and power density that will in the future be required as a result of component miniaturization. With their thermal cycling resistance and excellent thermal conductivity, Rubalit® HSS substrates are ideal for advanced processes and applications. Rubalit® HSS opens potentials in applications involving heavy mechanical loads combined with extreme demands in terms of thermal cycling resistance and surface quality. Combined with new high caliber technologies, this offers many potentials for the future. Innovative solutions will allow access to new applications in the automotive, power supply, sensor, durable goods, telecom, medical, and aerospace industries.

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Physical PropertiesOriginal ValueComments
Density 4.35 g/ccDIN EN 993: part 2
Water Absorption 0.00 %ASTM C373-88
Particle Size 2.0 µmMedium Grain (d50)
Thickness 200 - 400 microns
 
Mechanical PropertiesOriginal ValueComments
Modulus of Elasticity 335 GPaDIN V ENV 843-2
Flexural Strength 700 MPaBending Strength; 3-point method (30 mm/15 mm); 15 x d (mm); DIN EN 843-1
 800 MPaBending Strength; Double-Ring (40 mm/20 mm); 0.63 mm; DIN EN 1288
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 1e+05
@Temperature 600 °C
IEC 345
 1.00e+7 ohm-cm
@Temperature 400 °C
IEC 345
 1.00e+10 ohm-cm
@Temperature 20.0 °C
IEC 345
 1.00e+10 ohm-cm
@Temperature 200 °C
IEC 345
Dielectric Constant 9.0
@Frequency 1e+9 Hz
IEC 250
 12.5
@Frequency 1e+6 Hz
IEC 250
Dielectric Breakdown >= 6250 V
@Thickness 0.250 mm
DIN EN 60243
 
Thermal PropertiesOriginal ValueComments
CTE, linear 8.20 µm/m-°C
@Temperature 20.0 - 300 °C
DIN 51045
 8.80 µm/m-°C
@Temperature 20.0 - 600 °C
DIN 51045
 9.50 µm/m-°C
@Temperature 20.0 - 1000 °C
DIN 51045
Specific Heat Capacity 0.690 J/g-°CASTM-E1269
Thermal Conductivity 22.0 W/m-KDIN EN 821: part 2; Laserflash
 
Descriptive Properties
ColorCream
Ra = Arithmetic Mean Roughness Value (µm)Profilometer (cutoff 0.8 mm); DIN ISO 4287

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