Ceramics made from silicon nitride Silicon nitride Inorganic substance Si3N4 has the chemical formula. It is an important ceramic structural material that has high hardness, inherent wear resistance, and lubricity. It is an Atomic Crystal and it resists oxidation in high temperatures. It is also resistant to the impact of both cold and heat. It will not break if it's heated to over 1000degC and then quickly cooled, followed by a rapid heating. Because of its outstanding characteristics, silicon nitride can be used to make mechanical components like bearings, turbines blades, mechanical sealing rings, permanent molds and more. When silicon nitride is used as the heating surface for engine parts, the ceramics are not only resistant to high temperatures and heat transfer, but they also have a higher thermal efficiency.
Uses and functions of silicon Nitride
Silicon nitride Has a unique grain pattern, high strength and toughness, as well as excellent thermal resistance. It is a good choice for applications requiring high reliability and thermal stress as well as high dynamic stresses. This unique combination material properties provides advantages in applications that are exposed to harsh conditions, such as high-end ball and turbine bearings.
The main function
High mechanical strength, electrical insulation and toughness.
Useful Information
High-temperature parts, wear-resistant parts and components for semiconductor manufacturing equipment

What are the disadvantages of using and producing silicon nitride Ceramics?
Although silicon nitride has good properties, it also has the common property of ceramics--brittleness. Silicon nitride Ceramics are polycrystalline sintered bodies made up of ionic and covalently bound crystal grains. The chemical bond, which is highly directional, determines low grain density, low slip systems and low energy to crack. The fracture process is characterized by the addition of fracture surface energy and the absence of any other mechanism for energy dissipation. This results in defects like low strength and inadequate toughness. It is impossible to guarantee reliability due to the fatal weakness of brittleness. The silicon nitride research has always been focused on increasing its reliability and toughness.
Why is silicon nitride so expensive?
1. The price of powder is high.
Nitrogen and high-purity silicon are required for powder preparation. Temperature, time and pressure must be carefully controlled during the nitriding procedure. The powder prepared can be ground using high energy. The whole process requires high-tech equipment. For high-purity, Nanoparticle size and high-proportion of phase purity to be achieved, equipment, technology, and even quality management requirements are high.
2. The cost of ceramics made from silicon nitride is high.
1) High cost for sintering. In general, there are three types of silicon nitride silnir sintering: pressureless sintering or pressure sintering. In terms of ceramics, the three methods have progressively higher quality. All three methods have advantages. The higher quality ceramics are, the more expensive they will be.
2) High processing costs. Due to its high hardness, silicon nitride must be processed using diamond abrasives. For special shapes, special equipment will be required. Because of this, silicon nitride-based products are more costly.

(aka. Technology Co. Ltd., a trusted global chemical supplier & manufacturer has over 12 years experience in providing super-high-quality chemicals and nanomaterials. The silicon nitride Please note that the products produced by our company are of high purity and have low impurity. Please. Contact us if necessary.

The ceramic material silicon nitride is a non-organic ceramic that doesn't shrink during the sintering process. Silicon nitride has a high strength, particularly hot-pressed silica nitride which is considered one of the strongest materials in the universe. It has high density, low strength and resistance to high temperatures, among other properties.
A Si3N4 is a covalent bonding compound. The basic structural element is the [SiN4] Tetrahedron. The silicon is in the middle of the tetrahedron. Four nitrogen atoms surround it. They are located on the four vertices. The tetrahedrons have the same form as an atom. They are connected in a three-dimensional network.

Si3N4 ceramics used as structural materials: examples

It can be used for ball bearings because of its high rigidity, lightweight, and low weight. It generates less energy, is more precision than metal, and can be used in high temperatures and with corrosive media. It has heat resistance and wear resistance. The ceramic Si3N4 steam nozzle showed no damage even after a few month's use in a 650-degree boiler. Si3N4 can be used for ball bearings because of its high rigidity and lightweight. It generates less energy, is more precision than metal, and can be used in high temperatures and with corrosive media. The ceramic steam nozzle has heat resistance and wear resistance. It shows no damage even after a few month's use in a boiler with 650 degrees.

Si3N4 ceramics are widely used in a wide range of applications

Si3N4 ceramics' performance and reliability are set to continue improving with the advancement of molding, sintering technology and processing. Si3N4 Ceramics are rich in resources, have excellent properties, and possess characteristics that are unmatched by metals. These include wear resistance as well as corrosion resistance. It can handle harsh environments that metal or polymer material cannot.
Si3N4 ceramics are classified as high-temperature structure ceramics due to their superior mechanical properties, thermal characteristics, and chemical stability compared to other high-temperature structures ceramics. Material with the highest application potential.

(aka. Technology Co. Ltd., a global leader in chemical materials and nanomaterials with more than 12 year's experience as a supplier of high-quality chemicals. Our silicon nitride is of high purity and has a low impurity level. Contact us if you need to.

Silicon nitride The chemical formula is: The chemical formula of cyanoacrylate is as follows:
This can be done with diimine.

Or, use the carbothermal reduction to synthesize under an atmosphere of nitrogen at 1400-1450degC.

In the 1950s the method of nitriding a silicon elemental powder was discovered. It was also the first method to mass produce silicon nitride. The silicon nitride powder will have iron and silicate as impurities if the silicon raw material purity is low.
The diamine method produces amorphous silicon nitride, which must be further annealed in nitrogen at 1400-1500degC before it can become a powder. As of now, the diamine method is only relevant in terms of commercial production.
The most cost-effective and easiest way of manufacturing silicon nitride is through the carbothermal reaction.
Electronic grade silicon nitride The film is made by either chemical vapor deposited or plasma enhanced chemical-vapor deposition:

3SiH4(g) + 4NH3(g) -Si3N4(s) + 12H2(g) 3SiCl4(g) + 4NH3(g) -Si3N4(s) + 12 HCl(g) 3SiCl2H2(g) + 4NH3(g) -Si3N4 (s) + 6 HCl(g) + 6H2(g)

Two methods are available to deposit Silicon Nitride on a Semiconductor Substrate:
1. Use low pressure chemical vaporization technology using a tube furnace, either vertically or horizontally.
2. The plasma-enhanced vapor deposition technique is used under vacuum conditions of relatively low temperature.
The unit cell parameter of silicon nitride is different than that of elemental Silicon. Dependant on the deposition technique, the silicon nitride generated film can either generate tension, or stress. Adjusting the deposition parameter is a great way to reduce tension, especially when using plasma enhanced chemical vapor technology.
To obtain silicon nitride, the first step is to prepare silica using the sol-gel process. Next, the silica containing ultrafine carbon particles will be processed with the carbothermal method of reduction, followed by nitridation. The ultrafine carbon particles are formed by decomposing glucose at temperatures between 1200 and 1350degC. The reactions which are part of the synthesis can be:

SiO2(s), C(s), SiO(g), CO(g), SiO(g), 2N2 (g), CO(g), Si3N4 (s), +3CO2(g), or Si3N4 (+3CO2(g), or SiO3N4+3CO2(g),


Processing silicon nitride block
Silicon nitride As a granular substance, it is difficult to work with. It can't be heated higher than its melting point (1850degC) because silicon nitride would decompose to silicon and nitrogen. Hot press sintering is no longer acceptable. By adding sintering aids and binders, the silicon-nitride can be bonded into a solid material. Due to the necessity of adding binders or other sintering aids to the material, impurities will be introduced. Another method to produce purer bulk material is spark plasma sintering. The compacted powder will be pulsed within a short period of time (a few seconds). This method works at temperatures between 1500degC and 1700degC. The temperature at which you want to obtain compact and dense lumps of silicon nitride.

(aka. Technology Co. Ltd., a trusted global chemical supplier & manufacturer has over 12 years experience in providing super-high-quality chemicals and nanomaterials. The silicon nitride Please note that the products produced by our company are of high purity and have low impurities. Please. Contact us if necessary.

Silicon Nitride Ceramics:

Silicon nitride A synthetic superhard material, ceramics is made of a high-quality polymer. Ceramics have good lubricating qualities and high hardness. They are particularly hard at high temperatures, and so they offer outstanding wear resistance.
The silicon nitride's resistance to thermal shock, compared with other industrial materials ceramics, is also a distinctive feature. It is heated up to over 1000degC and then cooled rapidly, before being quickly heated again without splitting. Because of its excellent thermal shock resistance it is often used for high-temperature mechanical components, such as turbine blade mechanical sealing rings, welding moulds, etc.

Also, silicon nitride ceramics have excellent mechanical and workability properties. The hardness of silicon nitride common ceramics is less than diamond. Processing is usually based upon different processing technologies such as diamond wheels, grinding head, etc. Precision grinding, drilling, and cutting are all possible.

Silicon nitride ceramics applications:

Si3N4 Ceramic Material is an excellent material for high temperature engineering. Its application in this field can fully exploit its benefits.

The future direction of Si3N4 development is to: (1) make full use of Si3N4's excellent characteristics; (2) when Si3N4 Powder is sintered, create some new fluxes and research the best components from existing fluxes.

Si3N4 ceramics used in automobile engines have created a unique situation for the creation of new structural materials that can withstand high temperatures. The automobile industry is a multidisciplinary field that combines the best of many technologies. China is a civilization that has a very long history. In the development of ceramics, it has achieved many brilliant things. China's reform and openness will one day make it to the top of the auto industry and the ceramics development.

Tech Co., Ltd. is a professional silicon nitride Over 12 years in research and development of chemical products. You can contact us for high quality silicon-nitride. Contact us Send an inquiry.

What is silicon nitride (SiN)?

Silicon nitride has the chemical formula Si3N4. It is a ceramic material of high strength, lubricity and wear resistance. It is an unicrystalline atomic crystal that is resistant to oxidation.

It is also resistant to heat and cold. It won't be damaged if you heat it to over 1000degC and cool it quickly, then heat it rapidly. The excellent characteristics of silicon-nitride ceramic are the reason why it is used in many mechanical components, such as bearings and turbine blades. It can also be used to produce mechanical seal rings, permanent moldings, etc. When silicon nitride is used for the heating surfaces on engine components, it can not only improve the quality of an engine, but also fuel efficiency, and reduce the amount of heat transfer. China, Japan, the United States and other countries are developing such engines.

Silicon Nitride: Comprehensive Properties

A perfect combination material properties is what makes silicon nitride a ceramic. It is nearly as light as silica carbide, but has a microstructure that gives Si3N4 an excellent thermal shock resistant and high fracture toughness.

This microstructure is made up of interlocked microrods. The combination of these properties has been particularly useful in the machining or gray cast-iron blades and cast-iron with ceramic blades.

Unlike other cutting materials or hard metals, silicon nitride knives can be used at maximum speed without cooling lubricants.

Ceramic components made of Si3N4 are replacing traditional materials due to their excellent chemical and physical characteristics. Ceramics made of silicon nitride are used for sealing rings, bearings and seal technology.

The use of silicon nitride in these components has a major impact on their function, reliability, and service life. The combined bearing of ceramic material with carbon or strengthened plastic is light but very hard. This makes it resistant to centrifugal pressure and provides excellent performance in emergency situations and for dry running.

Tech Co., Ltd. () has over 12 year experience in chemical product development and research. We accept payment by Credit Card, T/T (West Union), Paypal, or T/T. The goods will be shipped to overseas customers via FedEx or DHL.

Contact us to send a request for Si3N4 powder.

What is it? Silicon Nitride ? Silicon nitride can be described as an inorganic substance that has the chemical formula Si3N4. It is an important structural ceramic material, with high hardness and wear resistance. It is also resistant to heat and cold shock. It can be heated to over 1000°C in the air. If it is quickly cooled, it will not break. This is because of the exceptional properties of silicon-nitride ceramics. It is used often to produce mechanical components, such as bearings. The heat-receiving area of engine components can be made from silicon nitride clays, which are heat-resistant and hard to heat transfer. This will not only increase the quality of the engines but also save fuel. Similar engines have been created in China and Japan.
Silicon Nitride's main features
The relative molecular weight is 140.28. You can choose from grey, white, or off-white. It is high temperature insoluble, has no melting points, and is strong against high temperature creep. The melting point of reaction sintered silicone nitride is over 1800°C; hexagonal system. The crystals are hexahedral. Si3N4 prepared through reaction sintering methods has a density of 1.82.7g/cm3, while Si3N4 made by hot pressing methods has a density of 3.123.22g/cm3. Mohs hardness 9.9, Vickers hardness 2.20, and microhardness 3.123.22g/cm3 are the Mohs hardness. Melting point 1900 (under pressure). Normal pressure usually causes it to decompose at around 1900 degrees Celsius. Specific heat capacity 0.71J/g*K The heat of forming is -751.57kJ/mol. The thermal conductivity of the material is (2-155) W/(m*K). The coefficient of linear expansion is 2.8~3.2x10-6/(20~1000). It is not soluble when water is used. Soluble in hydrofluoric acids. The temperature at the which oxidation in the air begins is 1300-1400. The specific volume resistance of the air is 1.4x105 *m for 20degC, and 4x108 *m for 500degC. The elastic modulus measures 2842046060MPa. The reaction sintered results in a 490MPa compressive force. At 1285, it reacts to dicalcium dimitride to produce calcium silicide. And at 600, the transitional metal is reduced and nitrogen oxides released. It has a bending strength of 147 MPa. You can make it by heating silicon powder with nitrogen or reacting silicon hailide with ammonia. The resistance is between 10 and 15 to 16 O.cm. Useful for high temperature ceramic raw materials.

Silicon Nitride Properties
Other Titles	silicon (IV), nitride
No.	12033-89-5
Combination Formula	Si3N4
Molecular Weight	140.28
Appearance	White powder to gray powder
Melting Point	1900 degC
Boiling Point	N/A
Density	2.2-3.5 g/cm3
Solubility of H2O	Insoluble
Electrical Resistivity	11-12 10x O.m
Specific heat	720 to 800 J/kg/K
Poisson’s Ratio	0.24 to $0.27
Thermal Conductivity	12 to 31 W/mK
Thermal Expansion	2.5 to 3.0 um/m-K
Young’s Modulus	140 to 315 GPa
Exact	139.943 g/mol

Silicon Nitride's applications
1. High thermal stability, high oxidation resistance and high product dimensional accuracy are all characteristics of silicon nitride ceramics. Silicon nitride, a covalent chemical compound with high bond strengths and the ability to form an oxide protective coating in the air, has excellent chemical stability. It is resistant to oxidization and can be infiltrated or damaged by many molten metals and alloys, including aluminum, lead, zinc, silver, nickel, etc. But it can also be corroded from molten liquids, such as magnesium and nickel-chromium alliance, as well as stainless steel. Silicon nitride ceramic materials are used for high temperature engineering components, advanced materials in metallurgical industries, corrosion-resistant parts and sealing components in chemical industries, and cutting and tooling in the machining industry.
Because silicon nitride forms strong bonds with aluminum oxide, silicon carbide, silicon carbide, thorium dioxide, boron and thorium dioxide it can be used to modify different ratios.
2. Also, solar cells can be made from silicon nitride. After the silicon-nitride coating is applied using the PECVD method it can be used as an antireflection film to reduce reflection of incident sunlight. During the deposition of the silicon silicon nitride movie, hydrogen atoms from the reaction product enter both the silicon film and the silicon wafer. This role was to prevent passivation. Here, the atomic ratio of silicon Nitride to silicon Nitride is not exactly 4:3. It fluctuates between different process conditions and different physical properties.
3. Ultra-high temperatures gas turbines, aircraft engines and electric furnaces are all suitable.
Silicon Nitride is the main supplier
Tech Co., Ltd. () is a professional nitirde dust Over 12 years' experience in chemical product development and research. We accept credit cards, T/T and West Union payments. We will ship goods overseas via FedEx, DHL and by air or sea to our customers.
You can find high-quality powdered boron carbide here Please contact us Send an inquiry

Silicon nitride can be considered an essential engineering clay. High temperatures give silicon nitride excellent mechanical properties. These include low density and high bending strength. They also have high fracture toughness. The material has excellent thermal characteristics, can withstand rapid, significant temperature changes and minimizes expansion and contraction. The chemical properties of silicon nitride are excellent, with good stability to acids and bases, corrosive and liquid metals.
The results of rolling contact fatigue (RCF), tests on several ceramic-based materials that were subjected to high performance bearing loads have shown that only fully dense silicon nitride is capable of outperforming bearing steel. RCF has a ten-fold longer service life than high-performance steel bearings, according to the compact Si3N4 bearing material. A high-speed rotating body may cause significant centrifugal stresses. Because it is a low-density metal, silicon nitride can be as light as aluminium. This material has an additional benefit. The low density Si3N4 helps to reduce the centrifugal stresses on the outer rings of the high speed rotating body. The high tensile strength and flexibility of silicon-nitride ceramics allows for resistance to elongation as well as resistance to fracture under higher lateral stresses. The full density Si3N4 is also extremely resistant to fracture toughness and modulus. This material can withstand severe operating conditions that could cause other ceramic materials such as cracking, deform and collapse.

It is capable of displaying superior mechanical properties and thermal properties. This makes silicon nitride suitable for demanding industrial applications. Thermal conductivity refers to the material's ability to conduct or transfer heat. The heat transfer coefficient plays a critical role in determining the suitability for industrial applications. Silicon nitride, due to its unique chemical structure and microstructure, has the same low thermal conductivity of metals.

These properties enable silicon-nitride's ability to significantly lower thermal conductivity in extreme temperatures. The thermal expansion problem occurs when materials heat up and their volume and size change in small increments. This expansion is dependent on the temperature of the material. The ratio of thermal expansion coefficients is a measure of the material's expansion per 1degC temperature increase. Because of the strong atomic bonds of Si3N4, this material has a low coefficient thermal expansion. It also experiences very little deformation when heated.

The superior thermal properties of silicon nitride make it less sensitive to high-speed applications. Because of its low dielectric constant (the ability to store electric energy in an electrical field), silicon nitride has been chosen for many RF applications. It also has excellent strength and heat resistance.

This unique combination of properties has led to further research on silicon nitride's use in structural ceramics for biomedical applications. In vitro and in vivo studies, as well as later studies involving the injection of silicon dioxide into animals, have established the biocompatibility. An in vitro study from 1999 further confirmed the biocompatibility claim of Si3N4 for functional human bone cell proliferation. These findings support silicon nitride being a promising biomedical material. Additionally to its biocompatibility silicon nitride has surface chemical characteristics that encourage bone formation (osteogenesis), as well as increased bone contact with implants.

Silicon nitride exhibits excellent stability because of its strong Atomic Bonds. This material is highly resistant to corrosion in acidic and alkaline environments at room temperatures. This is important when considering long-term implantation of silicon nitride in a salty and watery environment. This is due to the formation on the material of an oxide layer. When silicon nitride was subjected to hot gases, molten metals, or other chemicals, the same resistance was observed. The corrosion resistance of materials is affected by the formation of the oxide layer.

Its unique microstructure that self-reinforces, its high strength, toughness and other excellent properties make silicon nitride a desirable structural component for many applications across a range of industries, including biomedical.

Technology Co. Ltd. is a trusted global supplier and manufacturer of chemical materials. We have more than 12 years experience in producing super high-quality chemicals.
Send us an inquiry if you're looking for high-quality siN powder. (brad@ihpa.net)