Silicon nitride ceramic curved plate

Features

The performance of silicon nitride ceramic curved plates is based on the properties of the silicon nitride material itself, whose key characteristics include:
1. Excellent Mechanical Properties:
High strength and high toughness: Bending strength is typically above 800 MPa, and fracture toughness can reach 6-7 MPa·m¹/², significantly superior to traditional ceramics such as alumina, making it less prone to damage under load and impact.
High hardness and wear resistance: Vickers hardness can reach HV10 ≥ 1600, providing strong resistance to fretting wear and abrasive wear, making it suitable for long-term service in friction environments.
High elastic modulus: Approximately 310 GPa, giving the material high rigidity and helping to maintain the shape stability of the curved structure under load.
2. Excellent Thermal and Chemical Properties:
Good thermal conductivity: Thermal conductivity is in the range of 20–30 W/(m·K), outstanding among non-oxide ceramics, facilitating heat transfer and dissipation.
Low thermal expansion coefficient and high thermal shock resistance: The thermal expansion coefficient is approximately 2.3-3.2 × 10⁻⁶ /K, much lower than metal materials. Combined with its high strength, it can withstand drastic temperature changes exceeding 800°C without cracking.
Stable chemical inertness: Resistant to corrosion from almost all inorganic acids except hydrofluoric acid, with an oxidation resistance temperature above 1400°C, and non-wetting to many molten metals and non-metals.
3. Other Key Characteristics:
Low density: Density is approximately 3.1-3.3 g/cm³, contributing to lightweight design.
Excellent insulation: Resistivity is higher than 10¹⁴ Ω·cm, possessing excellent electrical insulation capabilities.
Self-lubricating tendency: During friction, especially in the presence of trace amounts of water vapor, a silicon dioxide lubricating film may form on the surface, helping to reduce the friction coefficient.‌