Silicon nitride ceramic structure is a kind of ceramic material composed of silicon and nitrogen elements, chemical formula Si3N4, with unique crystal structure and excellent physical and chemical properties . Its basic structural unit is the tetrahedron [SiN4], the silicon atom is located in the center of the tetrahedron, surrounded by four nitrogen atoms, forming the form of one atom for every three tetrahedra, forming a continuous and sturdy network in three-dimensional space
MATERIAL : Si3N4
DENSITY : 2.8
COLOR : Black / Blue / White
HRDNESS(Mohs scale) : 9
MAX WORKING TEMPERATURE : 1650
▼Performance characteristic
✔ High hardness : The hardness of silicon nitride ceramics is as high as HRC 90 degrees, showing excellent wear resistance |
✔ High temperature resistance : its melting point is as high as 1900℃, and it can still maintain high compressive strength at high temperature |
✔ Chemical stability : has good chemical stability, can maintain excellent performance in various chemical environments |
✔ Low thermal expansion coefficient : at the same temperature change, the thermal stress generated inside silicon nitride ceramics is relatively small, showing a strong thermal load resistance |
✔ Self-lubricating : silicon nitride ceramics have self-lubricating properties and are suitable for applications where friction needs to be reduced |
▼Field of application
1. Mechanical field: silicon nitride ceramics are widely used in the mechanical field to manufacture valves, pipes, grading wheels, ceramic cutters, bearing balls, etc. Its low density, high temperature resistance, self-lubrication and corrosion resistance make it widely used in high-speed machine tool spindle high-speed bearing, aerospace engine, wind turbine bearing, automotive engine bearing and other equipment.
2. Semiconductor field: silicon nitride ceramic has excellent thermal conductivity and high thermal conductivity, making it an ideal material in semiconductor packaging field. Silicon nitride substrates have excellent performance in integrated circuits, high thermal conductivity, high bending strength and good thermal matching, suitable for high-performance power modules.
3. Bioceramic field: As a new generation of bioceramic materials, silicon nitride ceramic has good radiographic imaging performance, anti-infection performance and biocompatibility, and is widely used in biological sensors, spine, orthopedics and dental implants.
4. Wave transmitting material field: silicon nitride ceramics and their composite materials have excellent performances such as heat resistance, wave transmitting and bearing, and are used to manufacture high performance wave transmitting materials such as radome and antenna window.
Application Examples of Silicon Nitride Ceramics
5. Bearing: silicon nitride ceramic bearing ball has the characteristics of low density, wear resistance, high temperature resistance, corrosion resistance and self-lubrication, especially suitable for high-speed rotating bodies, such as high-speed bearing of high-speed machine tool spindle, aerospace engine bearing, etc.
6. Substrate: in the semiconductor field, silicon nitride substrate is widely used in packaging of high-performance power modules due to its high thermal conductivity, high bending strength and good thermal matching.
7. Implants: Silicon nitride ceramics are used in the biomedical field to manufacture spinal intervertebral fusion devices, orthopedic and dental implants, etc., with good biocompatibility and anti-infection performance.
Transparent material: silicon nitride ceramic and its composite materials are used to fabricate radome and antenna window, which have excellent transparent performance and high temperature resistance.