Density: 3.1-3.3 g/cm³ (50%-60% lighter than steel).
Insulation performance: Volume resistivity > 10¹⁴ Ω·cm, dielectric strength > 15 kV/mm.
Operating temperature: Up to 1000℃ in air, up to 1400℃ in a protective atmosphere.
Product Introduction of Silicon Nitride Ceramic Sleeves
Silicon nitride ceramic sleeves are high-performance structural ceramics composed of Si₃N₄ crystals bonded by strong covalent bonds. Its molecular formula is Si₃N₄, and its crystal structure belongs to the hexagonal crystal system, usually existing in two crystal phases: α and β. This material forms a three-dimensional network structure through [Si3N4] tetrahedra, giving it extremely high intrinsic strength and toughness.
Main Features and Advantages
1. Mechanical Properties: Vickers hardness of over 1600 HV (HRA 90+), bending strength of 600-800 MPa, and compressive strength exceeding 1500 MPa.
2. High Temperature Resistance: Stable operation in air up to 1200℃, and up to 1400℃ under protective atmosphere.
3. Chemical Stability: Extremely strong resistance to acids, bases, and various corrosive media; almost no corrosion in sodium hydroxide solutions below 30%.
4. Thermal Properties: Thermal conductivity of 20-25 W/(m·K), and a thermal expansion coefficient of 3.2×10⁻⁶/℃.
5. Self-Lubricating Properties: Friction coefficient of 0.02-0.1, and wear rate is only 1/10 of traditional metal materials.
Application areas
industry | Typical applications | Advantages demonstrated |
Aerospace | Engine nozzles, combustion chamber lining | Resistant to instantaneous high temperatures of 3000℃. |
auto industry | Turbochargers, fuel injection systems | Resistant to temperatures above 800°C. |
Petrochemicals | High-pressure pumps and valves, mud pump seals | Corrosion resistance extends the maintenance cycle by a factor of two. |
electronic devices | IGBT power module substrate | Insulation withstand voltage > 10kV, heat dissipation efficiency increased by 30%. |
Medical food | Medical syringes, food-grade pump bodies | Biocompatibility is certified according to ISO 10993. |
Supports custom specifications.
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