Summary of the main uses of silicon nitride ceramics

Summary of the main uses of silicon nitride ceramics

Silicon nitride is an important structural ceramic material. It is a superhard substance with inherent lubricity and wear resistance, and is an atomic crystal; Antioxidant at high temperatures. And it can also resist cold and hot shocks. When heated to over 1000 ℃ in the air, it will not shatter even after rapid cooling and heating. It is precisely because silicon nitride ceramics have such excellent properties that people often use them to manufacture mechanical components such as bearings, turbine blades, mechanical sealing rings, permanent molds, etc. If high-temperature resistant and heat-resistant silicon nitride ceramics are used to manufacture the heating surface of engine components, it can not only improve the quality of diesel engines, save fuel, but also improve thermal efficiency. China, as well as countries such as the United States and Japan, have developed this type of diesel engine.

Silicon nitride ceramics have high hardness, excellent resistance to acid and alkali corrosion, and self-lubricating properties. Therefore, silicon nitride ceramic balls can be used as bearing balls in conjunction with metal or the same material shaft sleeves. Its own advantages can be used in special environments; In addition, ceramic valve balls can be used in the oil field, and their electrical insulation can also be made into insulation rings; Due to its high sintering temperature, silicon nitride structural components can be used as high-temperature support materials in the high-tech field; Silicon nitride ceramic knives are used in industrial machine tools, and so on

After being heated, silicon nitride ceramics will not melt into a molten body and will not decompose until 1900 ℃. They have amazing chemical corrosion resistance and can withstand almost all inorganic acids and less than 30% caustic soda solutions, as well as the corrosion of many organic acids; It is also a high-performance electrical insulation material. Widely used in aerospace, medical equipment, industrial furnaces, and intelligent electronic devices, among others.

What is the function of sintered pads

Features: Used for sintering injection molding powder metallurgy without decarburization, carburization, silicon infiltration, adhesion, etc., ensuring good dimensional shape of parts;

The cushion plate plays a role in weighing and is an intermediate medium for balancing different substances, and is an essential carrier for maintaining the level of substances.

High temperature sintering is used as a backing plate for powder metallurgy mesh belt furnace push rod furnace firing. This product has good flatness, excellent thermal stability, thin body shape, and can be continuously used and replace the original imported thin plate. The unevenness of larger products is less than 0.5mm, and the unevenness of smaller products is 0.03mm (requiring precision processing).

Reasons for choosing sintered pads (bearing plates):

During sintering, it is necessary to use the same low heat storage sintering pad (sintering plate) to isolate high-temperature sintering between the graphite plate and the parts; High alumina sintered pads with multiple porosity have lower thermal storage performance and excellent high-temperature resistance, thermal shock resistance, and chemical reaction resistance, ensuring the smooth sintering process and dimensional shape of the parts

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