The ceramic material is synthetic. The covalent bonds between silicon and nitrogen are strong in the ceramic’s structure. The silicon nitride is a ceramic with high strength and hardness. It also has good wear resistance.
Material industry has hailed silicon nitride materials as engineering ceramics with outstanding properties. They can also be applied in high temperature fields.
The properties and applications of silicon-nitride ceramics
Normal temperature strength and high fracture toughness are characteristics of silicon nitride. They will maintain their strength at high temperatures. These are its main performances:
1. Material made of silicon nitride has a low coefficient of linear expansion, excellent thermal conductivity and thermal shock resistance.
2. The hardness is very high, at 99.5. Only a few materials are harder, such as diamonds and BN.
It is also self-lubricating, wear-resistant and has a low friction coefficient.
4. Silicon nitride is a good material with good mechanical properties.
5.Silicon Nitride material is good at insulating and can be used in high temperature.
Silicon Nitride Ceramics: Applications
Si3N4 ceramics have been used widely in many industries due to its excellent properties.
In the machine industry, silicon-nitride ceramics can be found in turbine blades as well as mechanical seal rings, bearings for high temperatures, high speed cutting tools and permanent molds. ;
The metallurgical industries use silicon nitride ceramics as parts of thermal equipment like crucibles, aluminum reduction cell linings, and burners.
Chemical industry uses silicon nitride as a corrosion and wear resistant ceramic for parts such as pump bodies, ball valves, burners, vaporizers etc. ;
In the electronic industry, silicon-nitride ceramics can be used for high temperature insulators as well as film capacitors.
As radomes and engines, silicon nitride is used. Aerospace industry
Ceramics made of silicon nitride are used by the atomic industry to support and space nuclear reactors. They can also be used to carry nuclear fission products.
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