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Rulon Bearings

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CeramTec CeramCool® Rubalit® 708 Alumina, 96%
Categories: Ceramic; Oxide; Aluminum Oxide

Material Notes: CeramCool® is a metallized ceramic heat-sink for high power applications demonstrated by high power LED-systems. CeramCool® material characteristics: electrical insulation, high volume resistivity, thermal cycling stability, high breakthrough voltage, no corrosion, and no water intrusion. Benefits of CeramCool®: optimized thermal management, passive cooling, absorption of thermal stress, increased lifetime of die, higher color stability, reduction TCE mismatch, thermal expansion coefficient of semiconductor materials, one system for alignment of sources, simplified system, miniaturization, weight reduction, cost reduction, and high current conductors. CeramCool® can be metallized directly with thick or thin film processes such as conventional ceramic substrates. This makes the complete surface of the heat-sink useable as a circuit carrier while providing reliable electrical insulation. CeramCool® is available from the proven ceramic material Rubalit® 708. This material has a thermal expansion coefficient that is adapted to semi-conductor materials, possesses excellent electrical characteristics and is at the same time corrosion-resistant. CeramCool® is available with or without metallizations.

Key Words: Al2O3, aluminum oxide
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesOriginal ValueComments
Density 3.78 g/ccASTM-C20
Water Absorption 0.00 %ASTM-C373
Particle Size 3.0 - 5.0 µmMedium Grain (d50)
 
Mechanical PropertiesOriginal ValueComments
Modulus of Elasticity 340 GPaASTM-F417
Flexural Strength 400 MPaBending Strength; 4-point method (40x4x3 mm³); ASTM-F417
 500 MPaBending Strength; dual-ring method (0.63 mm substrate thickness); DIN 52292
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 1.00e+10 ohm-cm
@Temperature 600 °C
ASTM-D257
 1.00e+11 ohm-cm
@Temperature 400 °C
ASTM-D257
 1.00e+12 ohm-cm
@Temperature 200 °C
ASTM-D257
 1.00e+13 ohm-cm
@Temperature 20.0 °C
ASTM-D257
Dielectric Constant 9.8
@Frequency 1e+6 Hz
 10
@Frequency 1e+9 Hz
Dielectric Breakdown 7000 V
@Thickness 0.250 mm
ASTM-D149
 12600 V
@Thickness 0.630 mm
ASTM-D149
 15000 V
@Thickness 1.00 mm
ASTM-D149
Dielectric Loss Index 0.00030
@Frequency 1e+6 Hz
ASTM-D150
 
Thermal PropertiesOriginal ValueComments
CTE, linear 6.80 µm/m-°C
@Temperature 20.0 - 300 °C
ASTM-C372
 7.30 µm/m-°C
@Temperature 20.0 - 600 °C
ASTM-C372
 8.00 µm/m-°C
@Temperature 20.0 - 1000 °C
ASTM-C372
Specific Heat Capacity 0.800 J/g-°C
Thermal Conductivity 24.0 W/m-K
@Temperature 20.0 - 100 °C
ASTM-C408
 
Component Elements PropertiesOriginal ValueComments
Al2O3 96 %
 
Descriptive Properties
ColorWhite
Ra = Arithmetic Mean Roughness Value (µm)Profilometer (0.8 mm cutoff)

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