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Silicon Nitride Ceramics – Properties and Application


Silicon nitride

A synthetic material, ceramics can be described as such. Its covalent bond is strong between silicon atoms, nitrogen atoms. The silicon nitride clays exhibit high strength, high hardness and corrosion resistance.

Material industry views silicon nitride as an engineering material. It can be used even in extremely high temperatures.


Properties of silicon nitride-ceramics

The normal strength and fracture toughness of silicon nitride ceramics are high. They are strong even at elevated temperatures. High temperature stability is excellent. The following are the main features of this product:

1. Silicon Nitride material is low in linear expansion, has good thermal conductivity and high thermal shock resistance.

2. It is 99.5 hardness. Only a few other superhard materials, such as diamond or BN, are lower than silicon nitride.

3. Silicon Nitride’s friction coefficient, which is very low, is self-lubricating. It is also wear-resistant.

4. Silicon nitride exhibits good mechanical properties. Both hot-pressed samples and those that have been reaction sintered can attain high bending strength. However, high temperatures creep is minimal.

5.A good high-temperature insulator, silica nitride has excellent insulation properties.


Applications of silicon nitride clay

Si3N4 ceramics are widely used due to their excellent performance.

In the machinery industry, silicon nitride clays are used as permanent molds and turbine blades. ;

Silicon nitride Ceramics are used for parts in thermal equipment like crucibles, burners, and aluminum reduction cells linings within the metallurgical sector.

Silicon nitride Ceramics are used for corrosion-resistant, wear-resistant, and other parts of the chemical sector, such as ball valves. ;

The electronics industry uses silicon nitride Ceramics as high-temperature insulators and film capacitors.

For engines, radomes and other purposes, silicon nitride ceramics can be used. In the aerospace industry;

In the nuclear energy industry, silicon nitride Ceramics are used as support and spacers for nuclear reactors. They also serve as carriers for nuclear fission substances.

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