Ceramic Material Performance Comparison

Lilybearing offers ceramic materials such as silicon nitride, zirconia, alumina, silicon carbide, tungsten carbide and more. These materials will meet your needs in a variety of medical, chemical and aerospace engineering environments.

Below is a comparison of the properties of these materials.

Data Comparison Between and Silicon Nitride,Zirconia,Alumina,Silicon Carbide, and Tungsten Carbide

Item Unit Si3N4 ZrO2 Al2O3 SiC WC(YG8)
Density g/cm³ 3.20~3.30 6 >3.9 3.1 14.71
Thermal Expansion Coefficient 10^-6/k 3.2 8~11.5 4.5~8 4.3~5.2 -
Elastic Modulus GPa 280~330 210 375 400~420 -
Poisson Ratio - 0.26 0.30 0.22 0.14 -
Hardness (HV) (HV) 1400~1600 1100~1300 >1700 >2000 89.5(HRA)
Bending Strength MPa >800 >950 >330 >400 >1500
Crushing Strength MPa >4000 5000 2100 2600 -
Fracture Toughness MPam^1/2 6.0~8.0 8~10 4~6 4~5 -
Thermal Conductivity (20°C) W/mk 90~230 18~25 20~37 115~130 -
Specific Resistivity (20°C) Ωmm^2/m 10^14 10^12 10^14 - -
Max Usage Temperature °C 800 400 1500 1200 -
Corrosion Resistance - Better Better Better Better -
Dimension Stability with Temperature - little - - - -
Centrifugal Force - little large medium - -
Non-lubrication Friction - little little little - -
Magnetism - Naught Naught Naught - -
Ingredients
Y 4.0~5.0%
Y2O3 5.21%
Ca、Na and others 99%
AL <0.28%
WC 92%
Ti 1.0~1.5%
FeO3 <0.001%
Al2O3 >99%
Fe <0.2%
Co and others 8%
O 4.5~6.0%
Na2O <0.001%
-
Ti <0.26%
-
C 0.3~0.8%
SiO2 <0.001%
-
Zr 98.9%
-
Other impurities less than 0.1%
TiO2 94%
- - -
The rest is silicon nitride - - - -
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