Introduction to Silicon Nitride Ceramic Shaped Parts
Silicon nitride ceramic shaped parts are a high-performance structural ceramic material made from silicon nitride (Si₃N₄), possessing the following significant characteristics:
1. Physical Properties:
High strength and high toughness, high bending strength, and fracture toughness superior to most other ceramic materials.
Extremely low thermal expansion coefficient and excellent thermal conductivity, resulting in outstanding thermal shock resistance.
High hardness and self-lubricating properties, providing excellent wear resistance.
Low density (3.44 g/cm³), resulting in lightweight components.
2. Chemical Properties:
Extremely high chemical stability, resistant to most acids and alkalis.
A dense silicon dioxide protective film forms on the surface at high temperatures, allowing for long-term use at temperatures above 1200℃.
Can be used at temperatures up to 1400℃ in a protective atmosphere.
3. Comparison with Other Ceramic Materials:
Compared to alumina ceramics: superior toughness, thermal shock resistance, and high-temperature strength.
Compared to zirconia ceramics: more stable high-temperature performance.
Compared to silicon carbide ceramics: better fracture toughness and thermal shock resistance.
Application areas
Silicon nitride ceramic components with complex shapes are widely used in various high-end manufacturing fields:
Application areas | Application Scenarios | Advantages and Features |
mechanical Engineering | Bearing balls, valves, pipes, grading wheels, ceramic cutting tools | Wear-resistant, self-lubricating, and corrosion-resistant. |
semiconductor | Wafer carriers, substrates | High thermal conductivity, good thermal matching properties, and electrical insulation. |
New energy vehicles | Motor bearings | High temperature resistance (300-500℃), low friction coefficient |
Industrial kiln tools | High-temperature support components | Excellent thermal shock resistance and long service life. |
Aerospace | Engine parts | Good high-temperature strength retention. |
Biomedical | Artificial joints | Good biocompatibility and wear resistance. |
Supports custom specifications.
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