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Product Details:
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| Product Name: | High Grade Bearing Silicon Nitride Ceramic Ball | Material: | Silicon Nitride |
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| Application: | Industrial Ceramic | Packaging Details: | Box, Carton, Wooden, Bag Etc. Customized Package |
| Fracture Toughness: | 5.0～7.0 | Water Absorption: | 0% |
| Electrical Insulation: | Excellent | Density: | 3.2g/cm3 |
| High Light: | 3.2g/cm3 Machining Ceramic Parts,3.2g/cm3 Silicon Nitride Ceramic Ball,ODM Silicon Nitride Ceramic Ball |
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High Grade Bearing Silicon Nitride Ceramic Ball
Description:
Silicon nitride ceramic balls are precision ceramics 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, and can be used for in seawater for a pretty long time with good electrical and magnetic insulation. Its density is only 3.20g/cm3 which is almost 1/3 of the weight of bearing steel, and this makes it has small eccentric force and can achieve high speed rotation. with the property of self-lubricating, it can be used under the environment where there is no lubricating medium and has high pollution, thus makes it the first choice for ceramic bearings and hybrid ceramic ball bearings.
Technical Parameters:
| Mechanical behavior | Unit | Al2O3 | SiC | Si3N4 | ZrO2 |
| Colour | ------- | Light yellow | black | black | white,black |
| Density | g/cm3 | 3.95 | 3.15 | 3.2 | 6 |
| Bending strength | MPa | 300～400 | 400～500 | 800～1200 | 950～1200 |
| Elastic modulus E | GPa | 380 | 350 | 300-320 | 210 |
| Poisson's ratio | 0.22 | 0.14 | 0.26 | -------- | |
| Hardness | Hv | 1800 | 2000～2500 | 1400～1700 | 1100～1300 |
| HRC | 80 | 85～90 | 75～80 | 70～75 | |
| Fracture toughness | MPa·m1/2 | 3.0～4.0 | 3.0～4.0 | 5.0～7.0 | 8.0～10.0 |
| Maximum use temperature | ℃ | 1000 | 1300 | 400 | 400 |
| Thermal expansion coefficient | 10-6/℃ | 8.4 | 4 | 3.3 | 10.3 |
Advantages:
1. Low density: 3.2 g/cm3 with lightweight than most of other technical ceramics
2. Superior hardness, it's one of most hardest technical ceramic than others
3. Great wear resistance due to its exceptional hardness and self-lubricity
4. Great thermal shock resistance, it's up to 1000ºC under the special atmosphere
5. High mechanical strength and well resistance to impact than other advance ceramics
6. Chemical and corrosion resistance, resistant to almost all inorganic acids and many organic acids
7. At the same time, Silicon nitride is a high-performance electrical insulation material
Application:
Most ceramic balls are mounted in the bearing (high-speed bearing, high precision bearing, vacuum bearing, high/low-temperature bearing, nonmagnetic bearing, high precision ball screws) for the high technology industry, such as aerospace and national defense and etc. The ceramic balls can also be used for chemistry, metallurgy, medical treatment, food industry, oilfield, electronic engineering and etc.
More pictures:
Contact Person: Lucy Sun
Tel: 86-18662537949
