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Silicon Nitride application:
Silicon nitride has many unique characteristics and is an important engineering ceramic. Silicon nitride has excellent mechanical properties at high temperatures. These include low density, high flexural and tensile strength, high modulus elasticity, fracture toughness and high wear resistance. The material is also very strong and hard. Material also exhibits excellent thermal properties. It has minimal temperature-induced shrinkage and can resist thermal shock (rapid temperature changes). Finaly, silicon nitride is a material with excellent chemical properties. It can withstand most acids and alkalis as well as corrosive gases and liquid metals.
Silicon Nitride – Main Characteristics
It is also a good thermal conductor, which makes it a great material for demanding industrial uses. Thermal conductivity is a material’s inherent ability to transfer or conduct energy. The heat transfer coefficient determines whether engineering materials are suitable for applications requiring extreme temperatures. The low thermal conductivity of silicon nitride is due to its unique chemical and microstructure composition.
The material is extremely stable due to the strong atomic bonds. It is resistant to both acid and alkaline corrosion at room temperatures. This is especially important when considering the long-term use of silicon nitride in the human body. The corrosion resistance of a material is due to an oxide coating on its surface. The same corrosion resistance was observed in tests where silicon nitride had been placed in hot gases and molten metallic salts. The formation of an oxide layer plays an important and complex role in determining the corrosion resistance.
The self-reinforced structure, high strength, toughness and other excellent properties of silicon nitride have made it a popular structural component in various industries.
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