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What is Silicon Nitride Si3N4

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What is silicon nitride?

Silicon nitride is an inorganic substance with the chemical formula Si3N4. Gray, white or grayish white. The loved one molecular weight is 140.28.

It is an important structural ceramic product with high firmness. It has lubricity and also wear resistance, is an atomic crystal, and is antioxidant at heat. Other than hydrofluoric acid and hot phosphoric acid, it does not respond with other inorganic acids and also has solid corrosion resistance. And also it can also resist chilly and also warm shock, home heating in the air to greater than 1000 ℃, fast cooling and then quick heating, will not be broken.

Since silicon nitride ceramic has such excellent characteristics, it is commonly utilized to manufacture mechanical parts such as bearings, gas turbine blades, mechanical sealing rings, and irreversible moulds. If silicon nitride ceramic which is resistant to high temperature and hard to warmth transfer is used to manufacture the home heating surface area of engine parts, it can not just boost the high quality of the engine, save fuel, but also enhance the thermal efficiency.

Exactly how to create silicon nitride ceramics?

There are 2 primary production techniques of silicon nitride ceramic products: response sintering as well as hot-pressing sintering.

The reaction sintering technique is to form the mix of silicon powder or silicon powder and also silicon nitride powder according to the basic production approach of ceramic items. Then in the nitriding heater, pre-nitriding at 1150-1200 ℃, after obtaining a particular strength, it can be machined on the machine device. It is then more nitrided at 1350-1450 ℃ for 18-36h till all of it is changed to silicon nitride. This way, the size of the item is accurate and the volume is secure.

The hot-pressing sintering regulation is that silicon nitride powder and a percentage of ingredients (such as MgO, Al2O3, MgF2, AlF3 or Fe2O3, etc) are pushed and also sintered at the stress above 19.6 MPa as well as at 1600 ℃ to 1700 ℃. Typically speaking, the product prepared by hot pushing sintering has greater thickness and far better performance than that prepared by response sintering.

What is silicon nitride ceramic made use of for?

Silicon nitride porcelains have the features of high strength and high temperature resistance. among the ceramic products, silicon nitride ceramics have the most effective detailed mechanical residential properties, thermal shock resistance, oxidation resistance, use resistance and also corrosion resistance, so they are the very first prospect products for ceramics for thermal engine components. In the mechanical sector, silicon nitride ceramics are utilized as bearing balls, rollers, round seats, tooling, brand-new ceramic tools, pump plungers, mandrel sealing products and so on.

In the chemical sector, silicon nitride ceramics are used as wear-resistant and corrosion-resistant components. Such as round shutoff, pump body, combustion carburetor, filter and so on.

In the gold sector, silicon nitride ceramics have self-lubricity due to their heat resistance and also reduced rubbing coefficient. It is secure for a lot of steel and alloy services, so it can make tooling for steel product handling, such as mandrel, extrusion, cable tweezing die, roll, transfer roller, heating system fixture, thermocouple, steel heat treatment support, crucible, light weight aluminum fluid overview, light weight aluminum ladle cellular lining and so on.

Silicon Nitride Si3N4 Powder Price

The cost is influenced by lots of elements consisting of the supply and also need on the market, sector fads, financial task, market belief, as well as unexpected events.

If you are looking for the most up to date silicon nitride Si3N4 powder cost, you can send us your questions for a quote. (

Silicon Nitride Si3N4 Powder Supplier

Innovation Co. Ltd. is a relied on worldwide chemical product supplier & supplier with over 12-year-experience in offering extremely high-quality chemicals as well as nanomaterials consisting of silicon powder, nitride powder, graphite powder, zinc sulfide, calcium nitride, 3D printing powder, and so on.

If you are seeking top quality Si3N4 powder, please feel free to call us and send an inquiry. (

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