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Rulon Bearings

CeramTec Alunit® Aluminum Nitride
Categories: Ceramic; Nitride

Material Notes: Alunit® offers an extremely high thermal conductivity of 180 W/mK and outstanding electrical insulation properties. The thermal expansion coefficient of this material is comparable to silicon. Its electrical and mechanical characteristics are similar to aluminum oxide. Alunit® is non-toxic and environmentally compatible, presenting no disposal problems. Alunit® substrates come in a variety of surface finishes: as fired, as fired superior, ground, or polished. They can be manufactured by using tape casting, dry pressing, lasering, or metallizing. Typical applications include: power electronics, IGBT modules, telecommunications, cooling devices, DCB (Direct Copper Bonding), and LEDs.

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Physical PropertiesMetricEnglishComments
Density 3.33 g/cc0.120 lb/in³DIN EN 623-2 / ASTM-C373 / ASTM-C20
Water Absorption 0.00 %0.00 %DIN EN 623-2 / ASTM-C373
Particle Size 4.0 - 5.0 µm4.0 - 5.0 µmMedian Grain (d50)
 
Mechanical PropertiesMetricEnglishComments
Modulus of Elasticity 320 GPa46400 ksiASTM-F417
Flexural Strength 360 MPa52200 psiBending Strength; 4-Point Method (40x4x3 mm³); ASTM-F417
Poissons Ratio 0.320.32ASTM C-1259-94
Shear Modulus 121 GPa17500 ksiCalculated
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity 1.00e+13 ohm-cm1.00e+13 ohm-cmASTM-D257
Dielectric Constant 9.0
@Frequency 1e+6 Hz
9.0
@Frequency 1e+6 Hz
IEC 672-1 / ASTM-C150
Dielectric Breakdown 16000 V
@Thickness 1.00 mm
16000 V
@Thickness 0.0394 in
Dielectric Loss Index 0.00010
@Frequency 1e+6 Hz
0.00010
@Frequency 1e+6 Hz
IEC 672-1 / ASTM-D149,150
 
Thermal PropertiesMetricEnglishComments
CTE, linear  4.70 µm/m-°C
@Temperature 20.0 - 200 °C
2.61 µin/in-°F
@Temperature 68.0 - 392 °F
 5.20 µm/m-°C
@Temperature 20.0 - 600 °C
2.89 µin/in-°F
@Temperature 68.0 - 1110 °F
ASTM-C373
 5.60 µm/m-°C
@Temperature 20.0 - 1000 °C
3.11 µin/in-°F
@Temperature 68.0 - 1830 °F
Specific Heat Capacity 0.740 J/g-°C
@Temperature 100 - 200 °C
0.177 BTU/lb-°F
@Temperature 212 - 392 °F
DINV ENV 821-3
Thermal Conductivity 180 W/m-K1250 BTU-in/hr-ft²-°FDIN EN 821-2 / ASTM-C408
 
Descriptive Properties
ColorTranslucent Medium Gray
Ra = Arithmetic Mean Roughness Value (µm)Profilometer (0.8 mm Cutoff)

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 view all the property values for this datasheet as they were originally entered into MatWeb.

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CCERA937 / 107537

Master Bond adhesives

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