Silicon Nitride Balls
Silicon nitride ball is a kind of precision ceramic sintered at high temperature in a non-oxidizing atmosphere. It has high strength, high wear resistance, high temperature resistance, corrosion resistance, acid and alkali resistance. It can be used in sea water for a long time. When at 800℃, the strength and hardness are almost unchanged, and the density is 3.20g/cm3 which almost 1/3 of the weight of the bearing steel. Moreover, the centrifugal force is small when rotating, so the high-speed operation can be realized. Silicon nitride balls also have self-lubricity, therefore it can be used for non-lubricated medium and high-polluting environment. In addition, they can be used as optional balls for the ceramic bearing and the mixed ceramic bearing.
Product Specification:
| Items | Unit | Silicon Nitride /Si3N4 |
| Rockwell Hardness | HRA | ≥75 |
| Volume Density | g/cm3 | 3.25 |
| Electric Volume Resistivity | Ω.cm | 1014 |
| Breaking Tenacity | Mpa m1/2 | 6~9 |
| Elasticity Modulus | Gpa | 300~320 |
| Thermal Expansivity | m/K *10-6/℃ | 3.1~3.3 |
| Thermal Conductivity | w/(m.k) | 15~20 |
| Weibull Modulus | m | 12~15 |
Product Application:
- Silicon nitride balls can be applied for various bearings with ultimate performance requirements, such as high speed or ultra-high speed bearings, high precision bearings, vacuum bearings, high or low temperature bearings, non-magnetic bearings, high precision ball screws.
- Silicon nitride can be used as valve balls, measuring balls using in chemical pump, high temperature pump and metering pump.
- Silicon nitride also can be used in sliding and measuring situation with various special requirements, such as high temperature slide rail and corrosion resistant slide rail.
- Silicon nitride ball is generally assembled into mixed bearings, which can be used in high-tech industries such as aviation, national defense, etc., as well as in chemical industry, metallurgy, medical treatment, food, oil field, electronics and other industries.
For further information, you can contact our Sales Engineer, or you can contact us directly or here.