Silicon nitride ceramic is a high-performance ceramic material with silicon nitride (Si3N4) as the main component. Its internal structure is based on [SiN4] tetrahedrons, forming a three-dimensional network structure by sharing silicon atoms and nitrogen atoms. This material has the advantages of high strength, high temperature resistance, good thermal stability, chemical corrosion resistance, and good electrical insulation. Therefore, it is widely used in high-temperature engineering, machinery manufacturing, aerospace, electronic communications, biomedicine and other fields.
Silicon nitride ceramic components produced by Mingrui Ceramics
In the preparation process of silicon nitride ceramics, since it does not shrink during sintering, hot pressing sintering or reaction sintering methods can be used to obtain dense ceramics with high density, high strength and low porosity. In addition, silicon nitride ceramics also have excellent wear resistance, corrosion resistance and thermal shock resistance, and can withstand a wide range of temperature changes.
It is worth mentioning that pure silicon nitride ceramics will only decompose when heated in air above 1800°C. Therefore, silicon nitride ceramics are a very stable material in high temperature environments. In addition, silicon nitride ceramics also have a low thermal expansion coefficient and high thermal conductivity, which makes it have good thermal stability and thermal shock resistance at high temperatures.
Silicon nitride ceramic is a ceramic material with silicon nitride (Si3N4) as the main component. It has excellent physical, chemical and mechanical properties, so it has been widely used in many fields.
Performance characteristics of silicon nitride ceramics:
· High strength: Silicon nitride has high strength, especially hot-pressed silicon nitride, which has strong high temperature resistance and its comprehensive mechanical properties are the best among ceramic materials.
· High temperature resistance: At high temperatures, the strength of silicon nitride can be maintained up to 1200°C without decreasing.
· Thermal stability: Excellent thermal shock stability, able to resist hot and cold shocks.
· Chemical corrosion resistance: It can withstand almost all inorganic acids and less than 30% caustic soda solution. It is a high-performance electrical insulation material.
· Electrical insulation: Silicon nitride ceramic is a good electrical insulating material.
Performance advantages of silicon nitride ceramics:
· Silicon nitride ceramics have a small thermal expansion coefficient and can withstand a wide range of temperature changes.
· It will not break even if it is heated to above 1000°C in the air, cooled rapidly and then heated rapidly, and the material has extremely high stability.
· Silicon nitride ceramics have the characteristics of high strength, high temperature resistance, good oxidation resistance, wear resistance and corrosion resistance.
Applications of silicon nitride ceramics:
· High-temperature bearings: In high-temperature environments, the stability and high strength of silicon nitride ceramics make it an ideal material for manufacturing high-temperature bearings.
· Mechanical seal ring: The hardness and wear resistance of silicon nitride ceramic make it suitable for use as a material for mechanical seal rings.
· Pipes and valves for electromagnetic pumps transporting liquid aluminum: Due to its corrosion resistance and high stability, silicon nitride ceramics are used as pipes and valve materials for electromagnetic pumps transporting liquid aluminum.
Silicon nitride ceramics can still maintain good performance and stability under high temperature, high pressure, corrosive and other environments. Therefore, silicon nitride ceramics are a high-performance ceramic material with excellent performance and wide application. It is used in high-temperature engineering and machinery manufacturing. , aerospace, electronic communications, biomedicine and other fields have broad application prospects.