Silicon nitride ceramic ball is a kind of precision ceramics sintered at high temperature in non-oxidizing atmosphere, with high strength, high wear resistance, high temperature, corrosion resistance, acid and alkali resistance and other excellent properties. Its density is 3.20g/cm³, about 1/3 of the weight of bearing steel, small centrifugal force when rotating, suitable for high-speed operation. In addition, silicon nitride ceramic balls are also self-lubricating, suitable for non-lubricating media and high pollution environment
MATERIAL : Si3N4
DENSITY : 2.8
COLOR : Black / Blue / White
HRDNESS(Mohs scale) : 9
MAX WORKING TEMPERATURE : 1650
▼Performance characteristic
1. High hardness and wear resistance : the hardness of silicon nitride ceramic balls is very high, even comparable to diamond, and can maintain excellent surface integrity and service life in high-speed friction or wear environments
2. High temperature resistance : can maintain stability at the temperature of up to 1400°C, not prone to thermal expansion or deformation, is the ideal choice in high temperature environment
3. Corrosion resistance : has good corrosion resistance to most acids, alkalis and organic solvents, suitable for chemical processing, food processing and other fields
4. Low density and light weight : the density is about 3.20g /cm³, which is 1/3 of the weight of the bearing steel. The centrifugal force is small when rotating, suitable for high-speed operation
5. Self-lubricating : can be used in high pollution environment without lubricating medium, suitable for applications in high pollution environment
▼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.