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The ceramics material is synthetic. In its structure, there is a strong covalent bond between nitrogen and silicon atoms. The silicon nitride is a ceramic with high strength and hardness. It also has good wear resistance.
Material industry has a high regard for silicon nitride materials as engineering ceramics with good properties. They can be used at high temperatures.
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 performance features:
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. High temperature creep does not affect the flexural strength of silicon nitride.
5.Silicon Nitride material is good at high temperature and has good insulation properties;
Silicon Nitride Ceramics: Applications
Si3N4 ceramics have been used widely in a variety of industrial fields due to its excellent properties.
Silicon nitride Ceramics are used by the machinery industry for turbine blades. They can also be found in high-temperature rollers, high speed cutting tools, permanent moulds, and high temperature bearings. ;
The metallurgical industries use silicon nitride ceramics as a part on 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 or burners. ;
Silicon nitride Ceramics are used in electronics as high temperature insulators, film capacitors, and high-temperature dielectrics.
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 as carriers for fissionable materials.
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