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 |
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- |
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- |
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- |
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- |
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Other impurities less than 0.1%
|
|
- |
- |
- |
|
The rest is silicon nitride |
- |
- |
- |
- |
