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CeramTec Alunit® Aluminum Nitride

Category Ceramic , Nitride
Manufacturer CeramTec North America
Trade Name Alunit®
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF CeramTec Alunit® Aluminum Nitride.pdf
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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.
Physical Properties Metric English Comments
Density 3.33 g/cc
0.120 lb/in³
DIN 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 µm
4.0 - 5.0 µm
Median Grain (d50)
Mechanical Properties Metric English Comments
Modulus of Elasticity 320 GPa
46400 ksi
ASTM-F417
Flexural Strength 360 MPa
52200 psi
Bending Strength; 4-Point Method (40x4x3 mm³); ASTM-F417
Poissons Ratio 0.32
0.32
ASTM C-1259-94
Shear Modulus 121 GPa
17500 ksi
Calculated
Thermal Properties Metric English Comments
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-K
1250 BTU-in/hr-ft²-°F
DIN EN 821-2 / ASTM-C408
Electrical Properties Metric English Comments
Volume Resistivity 1.00e+13 ohm-cm
1.00e+13 ohm-cm
ASTM-D257
Dielectric Constant 9.0

@Frequency 1.00e+6 Hz
9.0

@Frequency 1.00e+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 1.00e+6 Hz
0.00010

@Frequency 1.00e+6 Hz
IEC 672-1 / ASTM-D149,150
Descriptive Properties Value Comments
Color Translucent Medium Gray
Ra = Arithmetic Mean Roughness Value (µm) Profilometer (0.8 mm Cutoff)
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