Silicon Nitride Balls Si3N4 Ceramic Bearing Ball
The linear expansion coefficient of silicon nitride ceramic ball is 3.2×10-6/K, which is almost 1/4 of the bearing steel ball. The self-lubricating properties of silicon nitride ceramic ball bearings can solve the pollution caused by the lubricating medium and the inconvenience of adding. Chemical resistance, mechanical strength, fracture toughness, low thermal conductivity. Application fields: composite bearings, mechanical seals, chemical pumps, nozzles, auto parts, heat exchanger parts, vacuum equipment, etc.
Silicon nitride ceramic ball can be used for a variety of bearings with performance requirements: high-speed bearings, high precision bearings, vacuum bearings, high/low temperature bearings, non-magnetic bearings, high precision ball screw; Can also be used in chemical pump, high temperature pump, metering pump used as valve ball, measuring ball.
Technical Parameter
| Property | Unit | Silicon nitride |
| Color | Black | |
| Mechanical Properties | ||
| Density | g/cm3 | 3.2 |
| Compressive Strength | MPa | 2500 |
| Flexural Strength | MPa | 900 |
| Vickers Hardness | GPa | 15 |
| Thermal Properties | ||
| Maximum Temperature | °C | 1500 |
| Thermal Conductivity @ 20°C | W/mK | 19 |
| Thermal Expansion a at 20–100°C | 10-6/K | 3.2 |
| Specific Heat | 100°C | 800 |
| Typical Characteristics | 1. High Hardness, Out Standing Wear Resistance 2. High Strength Over A Wide Temperature Range 3. Excellent Thermal Shock Resistance 4. Low Thermal Conductivity | |
| Typical Applications: | 1. Rotating Bearing Balls And Rollers 2. Cutting Tools 3. Semiconductor Handling Parts 4. Welding Pin 5. Welding Nozzles 6. Metal Tube Forming Rolls and Dies 8. Electronic Components 9. Engine And Turbine Components | |
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