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Ceramics made from silicon nitride
Silicon nitride
Inorganic substance Si3N4 has the chemical formula. It is an important ceramic structural material that has high hardness, inherent wear resistance, and lubricity. It is a crystalline atomic structure that is resistant against oxidation. Moreover, the crystal can withstand both cold and heat. It will not break if it’s heated to over 1000degC and then quickly cooled, followed by a rapid heating. Because of its outstanding characteristics, silicon nitride can be used to make mechanical components like bearings, turbines blades, mechanical sealing rings, permanent molds and more. When silicon nitride is used as the heating surface for engine parts, the ceramics are not only resistant to high temperatures and heat transfer but can also improve thermal efficiency.
Uses and functions of silicon Nitride
Silicon nitride Has a unique grain pattern, high strength and toughness, as well as excellent thermal resistance. It is a good choice for applications requiring high dynamic stresses, high thermal stresses and high reliability. This unique combination material properties provides advantages in applications that are exposed to harsh conditions, such as high-end ball and turbine bearings.
The main function
High mechanical strength, corrosion resistance and toughness, electrical insulation and thermal shock resistance
Useful Information
High-temperature parts, wear-resistant parts and components for semiconductor manufacturing equipment
What are the disadvantages of using and producing silicon nitride Ceramics?
Although silicon nitride has good properties, it also has the common property of ceramics–brittleness. Silicon nitride Ceramics are polycrystalline sintered bodies made up of ionic and covalently bound crystal grains. The chemical bond, which is highly directional, determines low grain density, low slip systems and low energy to crack. The fracture process is characterized by the addition of fracture surface energy and the absence of any other energy dissipation mechanisms. This results in defects like low strength and inadequate toughness. It is impossible to guarantee reliability due to the fatal weakness of brittleness. The silicon nitride research has always aimed to improve its toughness, and therefore its reliability.
Why is silicon nitride so expensive?
1. The price of powder is high.
Nitrogen and high-purity silicon are required for powder preparation. Temperature, time, air pressure and other parameters must be carefully controlled during the nitriding procedure. The powder prepared can be ground using high energy. The entire process has high requirements in terms of technology. For high-purity, Nanoparticle size and high-proportion of phase purity to be achieved, equipment, technology, and even quality management requirements are high.
2. The cost of ceramics containing silicon nitride is high.
1) High sintering costs. In general, there are three types of silicon nitride silo sintering: pressureless sintering or pressure sintering. In terms of ceramics, the three methods have progressively higher quality. All three methods have advantages. The higher quality ceramics are, the more expensive they will be.
2) High processing costs. Due to its high hardness, silicon nitride must be processed using diamond abrasives. For special shape processing, special equipment will be required. Because of this, silicon nitride-based products are more costly.
(aka. Technology Co. Ltd., a trusted global chemical supplier and manufacturer has over 12 years experience in providing super-high-quality chemicals. The silicon nitride Please note that the products produced by our company are of high purity and have low impurities. Please. Contact us if necessary.
Uses and functions of silicon Nitride
Silicon nitride Has a unique grain pattern, high strength and toughness, as well as excellent thermal resistance. It is a good choice for applications requiring high dynamic stresses, high thermal stresses and high reliability. This unique combination material properties provides advantages in applications that are exposed to harsh conditions, such as high-end ball and turbine bearings.
The main function
High mechanical strength, corrosion resistance and toughness, electrical insulation and thermal shock resistance
Useful Information
High-temperature parts, wear-resistant parts and components for semiconductor manufacturing equipment
What are the disadvantages of using and producing silicon nitride Ceramics?
Although silicon nitride has good properties, it also has the common property of ceramics–brittleness. Silicon nitride Ceramics are polycrystalline sintered bodies made up of ionic and covalently bound crystal grains. The chemical bond, which is highly directional, determines low grain density, low slip systems and low energy to crack. The fracture process is characterized by the addition of fracture surface energy and the absence of any other energy dissipation mechanisms. This results in defects like low strength and inadequate toughness. It is impossible to guarantee reliability due to the fatal weakness of brittleness. The silicon nitride research has always aimed to improve its toughness, and therefore its reliability.
Why is silicon nitride so expensive?
1. The price of powder is high.
Nitrogen and high-purity silicon are required for powder preparation. Temperature, time, air pressure and other parameters must be carefully controlled during the nitriding procedure. The powder prepared can be ground using high energy. The entire process has high requirements in terms of technology. For high-purity, Nanoparticle size and high-proportion of phase purity to be achieved, equipment, technology, and even quality management requirements are high.
2. The cost of ceramics containing silicon nitride is high.
1) High sintering costs. In general, there are three types of silicon nitride silo sintering: pressureless sintering or pressure sintering. In terms of ceramics, the three methods have progressively higher quality. All three methods have advantages. The higher quality ceramics are, the more expensive they will be.
2) High processing costs. Due to its high hardness, silicon nitride must be processed using diamond abrasives. For special shape processing, special equipment will be required. Because of this, silicon nitride-based products are more costly.
(aka. Technology Co. Ltd., a trusted global chemical supplier and manufacturer has over 12 years experience in providing super-high-quality chemicals. The silicon nitride Please note that the products produced by our company are of high purity and have low impurities. Please. Contact us if necessary.