• 0
  • 0

What is Silicon Nitride Si3N4 Powder used for?

Recently, covid 19 outbreak spreads in Shanghai, China. There are more than 25,000 new asymptomatic domestic infections every day. China is implementing a dynamic zero-out policy. A leading respiratory expert said the key to COVID-19 prevention and control is to minimize transmission and fatality rate. Omicron has a low case fatality rate but is highly transmissible and can still claim many lives in large outbreaks. "Total openness is not applicable in China.  For China, we should keep to the dynamic zero-out and gradually open up."  

However, "dynamic zero clearance" is not the pursuit of complete "zero infection".  As the Novel Coronavirus has its own uniqueness and strong concealment, there may be no way to prevent the detection of cases at present, but rapid detection and prompt treatment must be carried out, as soon as one case is found, one case will be dealt with.  

The situation in Shanghai is serious. As the financial center of China, Shanghai is a very important city, and the outbreak of the epidemic in Shanghai will put a great impact on China's economy.  The current task is to contain the spread of the epidemic as soon as possible, to achieve social zero so that Shanghai's life and economy quickly return to normal.  

As China plays an important role in the global supply chain, the outbreak will have a significant impact on the supply and prices of many Silicon Nitride powder.

Introduction to Silicon Nitride Si3N4 Powder
Silicon nitride or Si3N4 is a kind of white powdery crystal; The melting point is 1900, and the density is 3.44g/cm3 (20). There are two variants: the α type which is a hexagonal dense packing structure, and the β type which is a crystalline structure. Silicon nitride is gray when it has impurities or excess silicon. 

Physicochemical Properties of Silicon Nitride Si3N4 Powder
Silicon nitride hardly interacts with water. It slowly hydrolyzes to ammonium salt and silicon dioxide in a strong acid solution. Soluble in hydrofluoric acid, and does not act with dilute acid. A solution of strong alkali slowly corrodes the silicon nitride, and the molten strong alkali quickly converts the silicon nitride to silicates and ammonia. Above 600, Si3N4 can reduce transition metal oxides (see transition elements), lead oxide, zinc oxide, and stannic oxide, and release nitrogen oxide and nitrogen dioxide.
Silicon nitride is very strong, especially the hot-pressed silicon nitride. It is one of the hardest substances in the world. It is very high-temperature resistant, and it can maintain its strength at a high temperature of 1200. After heating, it will not melt into a melting body, until 1900 it will decompose. And it has amazing chemical corrosion resistance, almost all inorganic acid and 30% of the following caustic soda solution, also can withstand a lot of organic acid corrosion. It is also a kind of high-performance electrical insulation material.

Silicon Nitride Si3N4 Powder Properties
Other Names silicon (IV) nitride, α-Si3N4, SiN, trisilicon tetranitride, Si3N4 powder
CAS No. 12033-89-5
Compound Formula Si3N4
Molecular Weight 140.28
Appearance white to gray powder
Melting Point 1900°C
Boiling Point N/A
Density 2.2-3.5g/cm3
Solubility in H2O insoluble
Exact Mass 139.943


Silicon Nitride Si3N4 Powder CAS 12033-89-5


Applications of Silicon Nitride Si3N4 Powder
Silicon nitride is an important structural ceramic material with hardness, lubrication, and wear resistance. It is oxidation resistant at high temperatures. And it can also resist cold and hot shocks. Even though heated to more than 1000 in the air, through sharp cooling and then sharp heating, it will not break.
Because of such excellent characteristics, it is often used to manufacture bearings, turbine blades, mechanical seal rings, permanent molds, and other mechanical components. Using silicon nitride ceramic which is resistant to high temperature and not easy to heat transfer to manufacture the heating surface of engine parts can improve the quality of diesel engines, save fuel and improve the thermal efficiency.
In the mechanical industry, silicon nitride ceramics are used as bearing ball bearings, rollers, ball seat rings, molds, new ceramic cutting tools, pump plungers, spindle sealing materials, etc.
In the chemical industry, silicon nitride ceramics are used as wear and corrosion-resistant components, such as ball valves, pump bodies, combustion carburetors, filters, etc.
In the metallurgical industry, because of its properties of high-temperature resistance, small friction coefficient, and self-lubrication, and, for most metals, the alloy solution is stable, so silicon nitride ceramics can be used to make metal material processing die, such as dial core bar, extrusion, wire drawing die, roll, transfer roll, heating fixture, hot couple set camps, metal heat treatment support, crucibles, liquid aluminum guide camp, aluminum lining, etc.
Silicon nitride ceramic materials are also widely used in the electronics, military, and nuclear industries.

Main Supplier of Silicon Nitride Si3N4 Powder
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted global chemical material supplier & manufacturer with over 12-year-experience in providing super high-quality chemicals and Nanomaterials, including silicon powder, nitride powder, graphite powder, zinc sulfide, calcium nitride, 3D printing powder, etc.
If you are looking for high-quality silicon nitride Si3N4 powder, please feel free to contact us and send an inquiry. ([email protected])


Since February, gold has enjoyed a smooth upward run on the back of surging US inflation and the brewing of war. While expectations of rate rises have also risen in tandem over this period, gold had been largely pre-priced and the underlying driver of tightening expectations had come from inflation continuing to rise to record highs. The risk aversion caused by the continued tension in the war also provided an important short-term support for gold. This will have a certain impact on the price of the Silicon Nitride powder and the market of the Silicon Nitride powder. 

Inquery us

Our Latest News

Erbium oxide Er2O3 powder properties

Erbium oxide Er2O3 powder is a pink powder with the chemical formula Er2O3, mainly used as an additive for yttrium iron garnet and a control material for nuclear reactors.…

What is the applicable scope of FeSi2 iron disilicide powder?

Iron disilicide is an inorganic silicon compound with a molecular formula of FeSi2 and a molecular weight of 119.975. It is a gray powder, odorless, tetragonal crystals. For hydrogen catalytic oxidation and methanation catalyst.…

Sodium Oleate Properties

Sodium oleate, also known as sodium octadecenoate, and sodium oleate are organic oils that can be used as emulsifiers. Sodium oleate is used in medicine.…