Silicon nitride ceramic rings are usually manufactured by hot press sintering process . This process sintering silicon nitride powder under high temperature and high pressure conditions significantly improves the density and mechanical properties of the material. By optimizing the hot press sintering process, the overall performance of silicon nitride ceramic rings can be further improved, making it more suitable for harsh industrial needs
MATERIAL : Si3N4
DENSITY : 2.8
COLOR : Black / Blue / White
HRDNESS(Mohs scale) : 9
MAX WORKING TEMPERATURE : 1650
▼Performance characteristic
1. High hardness : the hardness of silicon nitride ceramics usually reaches more than 9 (Mohs hardness), can withstand greater friction and wear, especially suitable for high-speed operating environment
2. High strength : by hot pressing sintering process, the bending strength of silicon nitride ceramics can reach 700-800 MPa, showing very strong compressive and bending properties
3. High temperature resistance : the temperature range of silicon nitride ceramics can reach about 1600°C, so that it can still maintain high structural stability in the high temperature environment
4. Low thermal expansion coefficient : this makes silicon nitride ceramics can maintain dimensional stability when the temperature changes dramatically, and is not easy to crack or deformation
▼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.