High-temperature performance: Extremely low oxidation rate below 1400℃, and maintains structural stability at 1600℃.
Mechanical properties: Bending strength of 700-800 MPa, and fracture toughness of 6-8 MPa·m¹/².
Chemical stability: Corrosion rate in 98% concentrated sulfuric acid is only 0.002 mm per year.
Product Introduction of Silicon Nitride Ceramic Rings
Silicon nitride ceramic (Si₃N₄) is an important structural ceramic material with the following remarkable characteristics:
1. High strength: Tensile and bending strength can reach half that of other structural ceramics.
2. High heat resistance: Vickers hardness is 15-20 GPa, and it can still maintain a hardness of 8-10 GPa at a high temperature of 1200°C.
3. Corrosion resistance: It has extremely strong resistance to acids, alkalis, molten metals, and high-temperature gases.
4. Low friction coefficient: 0.02-0.1, possessing self-lubricating properties.
5. Thermal shock resistance: It can withstand rapid temperature changes of ΔT > 1000°C without cracking.
6. Low density: Approximately 1/3 the density of steel, which can reduce equipment weight.
Application areas
Application areas | Specific use | Strengths and advantages |
Mechanical manufacturing | Bearings, valves, sealing rings, cutting tools | Wear-resistant, self-lubricating, and high-temperature resistant. |
semiconductor | Wafer carriers, power module substrates | High thermal conductivity, good thermal matching properties. |
New energy | Hydrogen fuel cell sealing ring | Corrosion-resistant, extending lifespan by 6 times. |
auto industry | Turbocharger rotor | Response speed increased by 30%. |
Aerospace | Engine guide bushing | The wear rate is only 2.3 micrometers per 15,000 hours. |
Supports custom specifications.
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