Flexural strength: 600-800 MPa.
Fracture toughness: 5-7 MPa·m½.
Thermal conductivity: 20-25 W/m·K.
Density: 3.2-3.3 g/cm³ (apparent porosity <0.1%).
Resistivity: 10⁶-10⁹ Ω·cm (suitable for cleanroom environments).
Silicon Nitride Ceramic Rod Product Introduction
Silicon nitride ceramic rods are advanced ceramic materials primarily composed of silicon nitride (Si₃N₄), possessing the following significant characteristics:
1. High Strength and High Hardness: Vickers hardness reaches 1400-1600 HV, twice that of high-speed steel, and compressive strength exceeds 1800 MPa.
2. High Temperature Resistance: Can operate stably at high temperatures up to 1200°C, with a thermal shock resistance temperature difference of 800°C.
3. Self-Lubricating Properties: A nanoscale SiO₂ oxide film forms on the surface, resulting in a low friction coefficient of 0.05-0.1.
4. Chemical Stability: Resistant to most acids, bases, and molten metals, with an oxidation temperature threshold as high as 1300°C.
5. Low Thermal Expansion Coefficient: 3.2 × 10⁻⁶/K, close to that of semiconductor chips (Si, SiC), providing good thermal matching.
Application areas
Application areas | Specific use | Advantages and Features |
mechanical Engineering | Bearing balls, valves, pipes, ceramic cutting tools | Low density, wear-resistant, self-lubricating |
semiconductor | Power module substrates, wafer transfer robots | High thermal conductivity (80-90 W/mK), zero metal ion leaching. |
Chemical industry | High-pressure plunger pump, corrosion-resistant components | Corrosion rate < 0.001 mm/year |
Aerospace | Fasteners, engine parts | It has four times the strength-to-weight ratio of titanium alloys, and operates at temperatures from -180℃ to +800℃. |
energy | Ignition rods, thermocouple protection tubes | High temperature resistance, thermal shock resistance |
Supports custom specifications.
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