What are the main characteristics of silicon nitride

The main characteristics of silicon nitride

In addition to excellent mechanical properties, silicon nitride also exhibits a series of excellent thermal properties, making it suitable for demanding industrial applications. Thermal conductivity is the inherent ability of a material to transfer or conduct heat. The heat transfer coefficient is a key factor that characterizes the suitability of engineering materials for any industrial application under extreme temperature requirements. Due to its unique chemical composition and microstructure, silicon nitride has the same low thermal conductivity compared to metals.

Silicon nitride has excellent stability due to its strong atomic bonds, which makes the material highly resistant to corrosion by acid and alkaline solutions at room temperature. This is crucial when considering long-term implantation in the human body in a salt water environment. The corrosion resistance is mainly attributed to the formation of an oxide layer on the surface of the material. The same resistance was observed when silicon nitride was placed in hot gas, molten salt, and metal and subjected to corrosion testing in a complex environment. The formation of the oxide layer plays a core and complex role in the corrosion resistance of the material.

Due to its self-reinforced microstructure, extremely high strength and toughness, and many excellent properties, silicon nitride has become an attractive structural component for many applications in various industries (including biomedical applications).

Overview of silicon nitride Si3N4 powder

Silicon nitride Si3N4 powder is an inorganic substance with a chemical formula of Si3N4. It is an important structural ceramic material with high hardness, inherent lubricity, wear resistance, atomic crystal, and high temperature oxidation resistance.

Application of silicon nitride Si3N4 powder

1) Manufacturing structural equipment: metallurgy, machinery, aviation, aerospace, etc.

2) Surface treatment of metals and other materials: such as molds, knives, turbine blades.

3) Composite materials: such as metal, ceramic and graphite composite materials, rubber, and plastics.

4) Colorless, transparent, self-lubricating and wear-resistant nano-particle film, used for high-level surface protection such as mobile phones and automobiles.

5) Ball bearings.

6) Ball valves and parts.

7) Corrosion resistant turbine.

Other applications of silicon nitride Si3N4 powder

Silicon nitride Si3N4 powder is used as high-grade refractory material. For example, SI3N4-SIC refractory materials and sic are used in blast furnace bodies and other parts, and SI3N4-BN materials and BN are used in horizontal continuous casting separation rings. Continuous casting separation ring is a fine structure ceramic material with uniform structure, high mechanical strength, good thermal shock resistance, and will not be wetted by molten steel, which meets the requirements of continuous casting process

Silicon nitride Si3N4 powder ceramic material has excellent properties such as high thermal stability, strong oxidation resistance, and high product dimensional accuracy. Since silicon nitride is a covalent compound with high bonding strength, it can form an oxide protective film in the air, so it has good chemical stability and will not be oxidized below 1200°C. The protective film formed at 1200~1600°C can prevent It is further oxidized and will not be infiltrated by many molten metals or alloys such as aluminum, lead, tin, silver, brass, and nickel. Or corrosion, but it can be corroded by molten magnesium, nickel-chromium alloys, stainless steel and other melts.

Silicon nitride Si3N4 powder ceramic materials can be used for high-temperature engineering parts, advanced refractories in the metallurgical industry, corrosion-resistant parts and seals in the chemical industry, tools and knives in the machining industry, etc. It can form a strong bond with silicon carbide, aluminum oxide, thorium dioxide, boron nitride, etc., so it can be used as a bonding material for different proportions of modification.

In addition, silicon nitride can also be applied to solar cells. After the silicon nitride film is coated by the PECVD method, it can not only be used as an anti-reflection film to reduce the reflection of incident light, but also in the deposition process of the silicon nitride film, the hydrogen atoms of the reaction product enter the silicon nitride film and the silicon wafer passivation Defects. The ratio of the number of silicon nitride to silicon atoms here is not strictly 4:3, but depends on the process conditions within a certain range. Internal fluctuations, different atomic ratios correspond to different physical properties of the film.

Used in ultra-high temperature gas turbines, aircraft engines, electric furnaces, etc.

Silicon nitride Si3N4 powder price

The price of silicon nitride Si3N4 powder will vary randomly with changes in production costs, transportation costs, international situations, exchange rates and the supply and demand of silicon nitride Si3N4 powder. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for silicon nitride Si3N4 powder, please feel free to send an inquiry to get the latest price of silicon nitride Si3N4 powder.

Silicon Nitride Si3N4 Powder Supplier

As a global silicon nitride Si3N4 powder supplier, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (titanium nitride, silicon nitride, titanium nitride, etc.) high-purity targets, functional ceramics and structural devices, and provides OEM services.

Chemical Composition of Silicon Nitride Si3N4 Powder: