What material is silicon nitride?

Overview of silicon nitride

Silicon nitride is an inorganic substance with the chemical formula Si3N4.It is an important structural ceramic material with high hardness,inherent lubricity, and wear resistance.It is an atomic crystal;it is resistant to oxidation at high temperatures. Moreover,it can resist the impact of cold and heat.It will not be broken if it is heated to above 1000°C in the air,cooled rapidly and then heated rapidly.It is precisely because of the excellent characteristics of silicon nitride ceramic that people often use it to manufacture mechanical components such as bearings, turbine blades,mechanical seal rings,permanent molds, and so on.If silicon nitride ceramics,which are resistant to high temperatures and difficult to transfer heat,are used to make the heating surfaces of engine components,not only can the quality of the diesel engine be improved,fuel savings, and thermal efficiency can be improved.

Silicon nitride is very strong,especially hot-pressed silicon nitride,which is one of the hardest materials in the world. It is extremely resistant to high temperatures, and its strength can be maintained to a high temperature of 1200°C without falling.It will not melt into a melt after being heated,and will not decompose until 1900°C.It has amazing chemical corrosion resistance and can withstand almost all inorganic acids.And caustic soda solution below 30%,it can also withstand the corrosion of many organic acids;at the same time,it is a high-performance electrical insulating material.

Application of silicon nitride

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

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

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

4)Colorless and transparent self-lubricating wear-resistant nanoparticle film,used for advanced surface protection such as mobile phones and automobiles.

5)Ball bearings.

6)Ball valve and parts.

7)Corrosion resistant turbine.

Other applications of silicon nitride:

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

Silicon nitride ceramic materials have excellent properties such as high thermal stability,strong oxidation resistance and high product size accuracy.Since silicon nitride is a covalent compound with high bond strength,and can form an oxide protective film in the air,it is also It has good chemical stability.It will not be oxidized below 1200℃.The protective film formed at 1200~1600℃ can prevent further oxidation 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 alloy,stainless steel and other melts.

Silicon nitride ceramic materials can be used for high-temperature engineering parts,advanced refractories in the metallurgical industry,corrosion-resistant parts and sealing parts in the chemical industry, tools and cutting tools in the machining industry,etc.Because of silicon nitride and silicon carbide,alumina ,Thorium dioxide, boron nitride,etc.can form a strong bond,so it can be used as a bonding material and modified in different proportions.

In addition,silicon nitride can also be applied to solar cells.After the silicon nitride film is plated 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 reaction The hydrogen atoms of the product enter the silicon nitride film and the silicon wafer to passivate defects.The ratio of the number of silicon nitride to silicon atoms here is not strictly 4:3,but is in a certain range depending on the process conditions.Internal fluctuation,the physical properties of the film corresponding to different atomic ratios are different.

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

The price of silicon nitride

The price of silicon nitride will vary randomly with production costs,transportation costs,international conditions,and market supply and demand of silicon nitride.Tanki New Materials Co.,Ltd aims to help all industries and chemical wholesalers find high quality by providing a full set of customized services,Low-priced nano materials and chemicals.If you are looking for silicon nitride,please feel free to send an inquiry to get the latest price of silicon nitride.

Suppliers of silicon nitride

As a global silicon nitride supplier,Tanki New Materials Co.,Ltd has extensive experience in the performance,application and cost-effective manufacturing of advanced and engineered materials.The company has successfully developed

Series of powder materials(titanium nitride,silicon nitride,titanium nitride,etc.)high-purity targets,functional ceramics and structural devices,and provide OEM services.

Chemical Composition of Silicon Nitride Si3N4 Powder