Why silicon nitride is an important structural ceramic material

What’s silicon nitride?

Silicon nitride

This important structural ceramic material has high hardness and wear resistance. The atomic crystal resists high temperature oxidation. It is also resistant against cold and hot shocks. It can also be heated up to 1000°C in air. Then it is cooled quickly and heated intelligently until the material does not crack. This is because silicon nitride clays possess such great properties that they are often used to produce bearings, blades for turbines, seal rings and permanent molds. For example, silicon nitride ceramics are used for heating the surfaces of engine components. They are not easily heat transferred and are highly resistant to extreme temperatures. This can help improve middle distillate engines’ quality and also save on fuel and energy. China, Japan and the United States have all developed middle distillate engine technology.

Silicon nitride production process

The two main production methods for silicon nitride ceramics are reaction sintering (or hot pressing) sintering. According to general ceramic product production methods, the reaction sintering process produces silicon powder. Next, the furnace performs pre-nitriding at 11501200. The machine tool can then be used to machine the products after they have reached a desired strength. Then further nitriding takes place at 13501450 over 1836h, until products are silicon nitride. The product volume and size are stable because of this method. A hot pressing method involves combining silicon nitride powder and small quantities of additives like MgO or Al2O3, Al2O3, AlF2, MgF2, or Fe2O3. At a pressure of 19.6MPa or more, at a temperature between 16001700, hot pressing can result in denser products. They are more stable than products made with reaction sintering.


Silicon nitride applications

Si3N4 SIC refractories are used in combination with sic for blast oven stack. Other parts include SI3N4BN materials and BN for horizontal continuous casting separator ring. This ceramic material is acceptable and has a flat structure. The requirements of continuous cast mean that it cannot be wetted using liquid steel. Silicon nitride ceramic materials are also very stable, resistant to strong oxidation, and have excellent dimensional accuracy. Silicon nitride can be formed an oxide protective coating in the air and is therefore a good covalent compound. It cannot be reduced below 1200. Protective film created at 1200-1600 will prevent any further oxidation. It is not able to be soaked in molten metals and alloys like aluminum, lead and tin and can resist corrosion. However, it is susceptible to being damaged by molten solution like magnesium, nickel-chromium allie, and stainless steel.

Prices for silicon nitride

Prices will depend on how small and pure silicon nitride particles are. The purchase volume may also have an effect on cost. Large quantities of high quality silicon nitride are more expensive. On our official website, you can see the price of silicon nitride.

Silicon nitride supplier

The Advanc3dmaterials Advanced Material Nano Technology Co. Ltd.

Luoyang City is located in China’s Henan Province. (Advanc3dmaterials). This company supplies and manufactures high-quality chemical material worldwide. This company is a trusted supplier and manufacturer of high quality chemical materials and nanotechnology products with more than 12 years experience, such as silicon nitride. It also offers nitride Powder, graphite Powder, and sulfide Powder. We are happy to provide high-quality silicon nitride at a reasonable price.

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