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Silicon nitride Inorganic substance Si3N4 has the chemical formula. It is a ceramic material of high wear resistance, inherent lubricity and hardness. The atomic crystal silicon nitride resists oxidation when heated to high temperatures.
It is a synthetic ceramic. Because the covalent bonds between silicon atoms, and nitrogen atoms, in its structure, are strong, it has a high level of strength, hardness, corrosion, oxidation, abrasion, and thermal shock resistance.

Silicon Nitride: Properties

Normal temperature strength and high fracture toughness are characteristics of silicon nitride. They will maintain their strength at high temperatures. The properties of the material are:

(1) Silicon Nitride material is low in linear expansion, has good thermal conductivity and thermal shock resistance,
(2) The hardness level of silicon nitride, at 99.5, is the second highest in the world, only behind diamond and BN.
This material is self-lubricating as well as wear resistant.
(4) Silicon nitride exhibits good mechanical properties.
(5) Silicon nitride has excellent insulation properties at high temperatures;
It can also exist in some alkalis; It can be found in some alkalis.
When silicon nitride materials are oxidized a dense layer of silicon dioxide is formed easily on the surface. The film prevents continued oxidation. It can withstand oxidation temperatures up to 1400 degrees Celsius and be used in reducing environments for up to 1870 degrees Celsius.
Silicon nitride has a non-wetting property with high-temperature metallic solution and molten steel slag. This makes it an excellent corrosion-resistant slag material and high-temperature filter.

Material industry views silicon nitride ceramic as a material with excellent overall performance that can be used for high temperature fields.

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