Optical lens mold core
- Fields：
- １、Optical molded glass lens
- ２、Manufacturing equipment industry
Special material of silicon nitride
Using the technology of forming with ultrafine silicon nitride powder, materials that are resistant to high and low temperature instant changes can be produced, which have the advantages of low coefficient of thermal expansion and self-lubrication, thereby improving efficiency and increasing production capacity.
Technical specifications of silicon nitride Si3N4 material.
| Item | Unit | Test Standard |
|---|---|---|
| Density | g/cm3 | 3.2 |
| Elastic Modulus | Gpa | 300 |
| Coefficient of thermal | 10-6K-1 | 3.2 |
| hardness (HV) | Mpa | 1600 |
| Fracture toughness | Mpa | 7.0 |
| Flexural Strength (room temperature) | Mpa | 720 |
| Flexural Strength (700℃) | Mpa | 450 |
| Bending strength (room temperature) | Mpa | 2500 |
| Thermal conductivity W | (mk)-1 | 20 |
| specific resistivity | ≥1015 | |
| Maximum operating temperature (no load) | ℃ | 1100 |
| Acid and alkali corrosion resistance | strong |