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Ball.Ceramic Ball Silicon Nitride Ball (Si3N4)
This dense ceramic is sintered under a nonoxide atmosphere at a high temperature, and maintains covalent bonds; excellent thermal, wear, corrosion resistance; and high-temperature strength and hardness, making it a good high-temperature structural material.
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Production Range
0.8 mm -25.4 mm (25.4 mm or bigger, customizable)
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Applications
Combined bearings, Mechanical seals, Chemical pumps, Nozzles, Automotive parts, Heat exchanger parts, etc.
본문
(Chemical Composition)
| Symbol | Chemical Composition |
|---|---|
| Aluminum(AL) | 2.0 ~ 3.5% |
| Yttrium(Y) | 4.0 ~ 5.0% |
| Titanium(Ti) | 1.0% ~ 6.0% |
| Oxygan(O) | 4.5% ~ 6.0% |
| Carbonⓒ | 0.3% ~ 0.8% |
Mechanical Property
| Performance of Si3N4 Ceramic Material | ||
|---|---|---|
| Density | g/㎤ | ≥3.2 |
| Hardness(HV) | Hv | 1400 ~ 1600 |
| Bending Strength | Mpa | ＞800 |
| Crushing Strength | Mpa | ＞4000 |
| Elastic Modulus | Gpa | 300 ~ 315 |
| Fracture Toughness | Mpa m½ | 6 ~ 8 |
| Thermal Expansion Coefficient | 10-6/K | 2.2 ~ 3.0 |
| Max Usage Temperature | ℃ | 1200 |
Production Grade (Unit : ㎛)
| Grade | Name Application Range | Shape Precision and Roughness | Sectional Precision and Gauge | ||||
|---|---|---|---|---|---|---|---|
| Grade | Metric | Inch | Diameter Variance (VDWS) | Sphericity(Max) | Surface Roughness (Ra) | Variance in LOTs (VDWL) | Gauge Interval |
| 10 | 0.3 ~ 25 | 0.025 ~ 1 | 0.25 | 0.25 | 0.025 | 0.5 | 1 |
Ball-mill products have separate grades.