■ Introduction:
Si3N4 Silicon nitride heat shield thermal shroud is a high temperature insulation material made of silicon nitride ceramics. Silicon nitride heat shield has high temperature oxidation resistance, high temperature strength, resistance to chemical erosion and other excellent performance, can work stably in high temperature, high pressure, strong corrosion environment for a long time.
Silicon nitride thermal sheild is mainly used in high temperature heat treatment, high temperature melting, high temperature oxidation, high temperature combustion and other processes, as a protective device, to isolate high temperature, high pressure gas or liquid damage to equipment and personnel. Si3N4 heat protection shield is widely used in aerospace, chemical, metallurgy, electronics and other fields of high temperature equipment.
■ Technical data sheet:
Properties | Unit | Data |
Si3 N4 Content | % | ≧92% |
Density | g/cm3 | ≧3. 1 |
Relative Density | g/cm3 | >99.6 |
Elasticity Modulus | Gpa | 300-500 |
Crushing Load Ratio | (25℃)% | ≧45 |
Hardness | (Hv)Mpa | 1800-2000 |
Fracture Toughness | Mpa•m1/2 | 7.0-8.5 |
Flexural Strength | Mpa | ≧600 |
Poisson Ratio | / | 0.25 |
Coefficient of linear expansion | 10-6 K- 1 | 3.2-3.4 |
Heat Conductivity | W•(M•K)- 1 | 20-25 |
Surface smoothness | / | ≤0.3 |
Electrical isolation | KV | ≧20 |
Acid&Alkali Resistance | / | excellent |
Magnetism | / | Without |
Working Temperature | ℃ | 1400 |
■ Advantages:
1. Strong corrosion resistance: Si3N4 thermal protection shield have excellent corrosion resistance and can be used in acid and alkali and other corrosive environment for a long time.
2. Good mechanical properties: Silicon nitride thermal sheild have excellent mechanical properties and are not easy to deform and crack under high temperature and pressure.
3. Excellent high temperature resistance: Silicon nitride heat shield have extremely high temperature resistance and can work stably in high temperature environment for a long time.