Advanced Ceramic Solutions for Extreme Environments

ISN logo

Material Properties Datasheet

International Syalons offer a range of advanced technical ceramics such as silicon nitride, sialon, alumina, zirconia and silicon carbide. The following datasheet compares the physical properties of these materials.

PROPERTY UNITS SIALON / SILICON NITRIDE ALUMINA ZIRCONIA SILICON CARBIDE
Syalon 101 Syalon 050 Syalon 110 Syalon 201 Syalon 501 Aluminon 96 Aluminon 995 Aluminon 999 Zircalon 5 Zircalon 10 Zircalon 20 Sycarb 10 Sycarb 20
Composition - β-Sialon α/β-Sialon Sialon/BN β-Sialon Sialon/TiN 96% Al2O3 99.5% Al2O3 99.9% Al2O3 YSZ YSZ MgSZ SSiC SiSiC
Density g/cc 3.24 3.23 2.65 3.24 4.01 3.75 3.89 3.95 6.13 6.05 5.70 3.15 3.10
Porosity % 0 0 10 0 0 0 0 0 0 0 0 0 0
MECHANICAL PROPERTIES
3 point Modulus of Rupture 20°C MPa 945 800 500 825 825 300 330 500 1000 1200 500 450 420
3 point Modulus of Rupture 1000°C
MPa 700 750 400 750 - 200 250 300 - - - 450 420
Compressive Strength MPa >3500 >3500 - >3500 >3000 >2000 >2000 >2500 >2000 >2000 >1600 >3500 >2600
Young's Modulus of Elasticity GPa 288 290 - 290 330 330 370 400 205 205 210 410 400
Poisson's Ratio - 0.23 0.23 - 0.23 - 0.22 0.22 0.22 0.30 0.30 0.30 0.21 0.20
Hardness (HRA) - 92 94 88 92.7 90.5 - - - 91 91 90 - -
Hardness (Vickers Hv50) GPa 14.71 19.81 11.77 16.18 13.24 15.71 15.71 17.65 13.24 13.24 11.77 25.50 23.54
Fracture Toughness K1C MPa m½ 7.7 6.5 3.5 4.6 5.7 3.5 4.0 4.5 8.0 10.0 7.0 4.0 4.0
THERMAL PROPERTIES
Thermal Expansion Coefficient K-1 3.0X10-6 3.2X10-6 3.0X10-6 3.0X10-6 5.6X10-6 7.0X10-6 7.8X10-6 8.5X10-6 10.0X10-6 10.0X10-6 11.0X10-6 4.4X10-6 4.3X10-6
Thermal Conductivity W/(mK) 28 20 27 21 19 20 30 30 2 2 2.5 150 110
Thermal Shock Resistance ΔT°C 900 600 800 600 400 200 200 220 250 250 350 350 400
Maximum Use Temperature °C 1200 1450 1450 1450 700 1600 1700 1700 1000 1000 1000 1400 1400
ELECTRICAL PROPERTIES
Electrical Resistivity ohm cm 1012 1012 1012 1012 7.2x10-4 1015 1015 1015 1011 1011 1011 104 102

Typical physical property data obtained under test conditions. All properties have been measured by independent testing authorities. The values given only apply to the test bodies on which they were determined, and therefore can only be recommended values. See our disclaimer.

Download the Material Properties Datasheet PDF (0.12 Mb). Alternatively contact us and talk to our of material specialists.