Description
Delivering unmatched thermal stability, high hardness, and corrosion resistance for advanced material applications.
Advanced Industries – Enhance Performance with Silicon Nitride
High Purity & Nitrogen Content
Ensures superior material quality and performance in demanding applications.
Exceptional Thermal Stability
Withstands extreme temperatures without degradation, ideal for high-temperature environments.
Outstanding Corrosion Resistance
Resists almost all inorganic acids and caustic soda, prolonging product lifespan.
High Mechanical Strength
Hardness close to corundum, self-lubricating, and wear-resistant for long-lasting use.
Features
Silicon Nitride Powder (Si3N4) is a white-gray advanced ceramic material known for its excellent thermal and chemical properties. It features a high melting point of 1900°C, thermal conductivity of 25W/m.K, and specific heat of 800J/Kg.°C. With a molecular weight of 140.3 and Moh’s hardness of 9, it offers superior durability and performance. The powder is characterized by high purity, high nitrogen content, narrow particle size distribution, and high sintering activity.
Benefits
This Silicon Nitride Powder provides exceptional benefits including high mechanical strength, excellent thermal stability, and outstanding corrosion resistance. It maintains its strength up to 1200°C without decreasing, ensuring reliable performance in extreme conditions. Its low density and small specific gravity (only 2/5 of steel) make it an ideal choice for applications requiring lightweight yet strong materials. Additionally, its excellent electrical insulation properties enhance its versatility across various industries.
Use Cases
Silicon Nitride Powder is widely used in ceramic-grade materials for manufacturing high-performance silicon nitride-ceramic structural parts, balls, and targets. In the photovoltaic industry, it serves as a crucible coating for polysilicon ingots and high-performance nitride phosphors. Metallurgical applications include crucibles, muffle furnace chambers, and aluminum liquid conduits. The machinery industry utilizes it for high-speed turning tools, bearings, and rotor blades. Chemical industry applications encompass valves, pump bodies, and heat exchanger parts. It’s also vital in semiconductor, aviation, atomic energy, and medical engineering for manufacturing substrates, insulators, and artificial joints.
| Name | Silicon nitride powder |
| Molecular formula | Si3N4 |
| Color | White-gray |
| Melting point | 1900℃ |
| Thermal conductivity | 25W/m.K |
| Specific heat | 800J/Kg.℃ |
| Dielectric constant | 8.3@1Hz |
| Molecular weight | 140.3 |
| Moh’s hardness | 9 |
| Product advantages： | |
| Basic characteristics of silicon nitride powder: ●Silicon nitride is an advanced ceramic material that has excellent thermal and chemical properties with high hardness, stable structure, low coefficient of thermal expansion, excellent oxidation and corrosion resistance. The silicon nitride ceramic powder produced has high purity, high nitrogen content, narrow particle size distribution, high sintering activity, stable chemical composition, decomposition resistance, high-temperature oxidation resistance, especially high-temperature strength, high hardness, good wear resistance, and It has good thermal and mechanical impact and self-lubricating effect. It forms a finely dispersed phase in the composite material, thereby greatly improving the comprehensive performance of the composite material. ●High mechanical strength; hardness close to corundum; self-lubricating; wear-resistant. The room temperature flexural strength can be as high as 980MPa, which can be compared with alloy steel, and the strength can be maintained up to 1200℃without decreasing. ●Good thermal stability; small thermal expansion coefficient; good thermal conductivity. So thermal shock resistance is very good, which will not crack from room temperature to 1000℃thermal shock. ●The chemical performance is stable, and it is resistant to almost all inorganic acids (except HF) and caustic soda (NaOH) solutions with a concentration of less than 30%. It is also resistant to the corrosion of many organic substances. It is not resistant to a variety of non-ferrous metal melts (especially molten aluminum). And it can withstand strong radiation exposure. ●Low density; small specific gravity; only 2/5 of steel; excellent electrical insulation. |
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| Application | |
| The main use of silicon nitride powder: ●Silicon nitride based on ceramic-grade material, which is mainly used to make high-performance silicon nitride-ceramic structural parts, silicon nitride ceramic balls, silicon nitride targets, etc.; ●Silicon nitride-based on photovoltaic-grade material with a purity of over 99.99%, can be used for crucible coating (release agent) for polysilicon ingots, high-performance nitride phosphors, and other fields; ●It can be made into components on thermal equipment such as crucibles, muffle furnace chambers, burners, heating element fixtures, casting molds, aluminum liquid conduits, thermocouple temperature measurement protection sleeves, and aluminum electrolytic cell linings in the metallurgical industry. ●It can be made into high-speed turning tools, bearings, supports for heat treatment of metal parts, rotor blades, gas turbine guide blades and turbine blades in the machinery industry. ●It can be made into all valves, pump bodies, sealing rings, filters, heat exchanger parts, fixed catalyst carriers, combustion boats, evaporating dishes, etc. in the chemical industry. ●In the semiconductor, aviation, atomic energy and other industries, it is used to manufacture switching circuit substrates, film capacitors, electrical insulators that withstand high temperatures or sudden temperature changes, radomes, missile nozzles, supports and separators in atomic reactors, and nuclear fission Substance carrier, etc. ●In medical engineering, it can be made into artificial joints. ●Using an all-ceramic engine made of silicon nitride material to replace the metal engine of the same type. |
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Why Choose Silicon Nitride Powder?
Silicon Nitride Powder offers unparalleled thermal stability, high hardness, and exceptional corrosion resistance, making it ideal for advanced material applications across various industries. Its high purity and nitrogen content ensure superior performance, while its lightweight and excellent electrical insulation properties enhance versatility.
Key Benefits of Silicon Nitride Powder
Benefit from its high mechanical strength, outstanding thermal stability, and corrosion resistance. It maintains strength at high temperatures, prolongs product lifespan, and reduces maintenance costs. Its lightweight nature and excellent insulation make it a cost-effective solution for advanced industries.
Diverse Applications of Silicon Nitride Powder
From ceramic structural parts to photovoltaic coatings, and from metallurgical crucibles to medical implants, Silicon Nitride Powder finds applications in a wide range of industries. Its versatility and performance make it a valuable addition to any advanced material portfolio.
