Characteristics and Application of Silicon Carbide Nanopowder

Silicon carbide nanopowder is an inorganic nano material with silicon carbide (SiC, chemical formula SiC) as the core component and particle size between 1 and 100 nanometers. As a high-end category of the silicon carbide family, it has both the unique advantages of nano materials and the inherent characteristics of silicon carbide. Its crystal structure is mostly cubic (3C-SiC, β – SiC) or hexagonal (4H-SiC, 6H-SiC, α – SiC).

Core characteristics of silicon carbide nano powder

The core competitiveness of silicon carbide nano powder lies in the performance breakthrough brought about by its “nano particle size”, while inheriting the excellent characteristics of silicon carbide material itself, its comprehensive performance is far superior to that of ordinary silicon carbide powder, which can be divided into the following five core characteristics, and is also the key to its adaptation to multiple high-end scenes.

1. Physical Characteristics: Ultra-fine and high-purity, structurally stable

The particle size of silicon carbide nano powder is usually controlled between 30 and 100 nm. Some high-end products can reach below 30 nm, with a specific surface area of 70-90 m2/g. The particles are evenly distributed and well dispersed. After surface hydroxylation or coating treatment, the interface bonding ability can be further improved to avoid agglomeration. Its purity can reach over 99%, and the purity of high-end products can even reach 99.9999%. The total impurity content is ≤ 1ppm, effectively avoiding the interference of impurities on the performance of the substrate. At the same time, its density is 3.22 g/ml, and its Mohs hardness is as high as 9.5, which is between corundum and diamond. Its microhardness can reach 2840~3320kg/mm ², making it a high-quality wear-resistant reinforcement material with a stable crystal structure and less prone to lattice distortion.

2. Thermal characteristics: high temperature resistance, excellent thermal conductivity

Silicon carbide nano powder has extremely strong high-temperature resistance. Its melting point is up to 2700 ℃, and its decomposition temperature exceeds 2700 ℃. It can be used stably for a long time in a high-temperature environment above 1600 ℃, far superior to ordinary metal and ceramic materials.

3. Chemical characteristics: Strong inertness and outstanding corrosion resistance

Silicon carbide nano powder has strong chemical inertia. Its main component is silicon carbide (chemical formula SiC), which contains 88% covalent bonds and 12% ionic bonds. It is not easy to react with strong acids, strong bases, molten metals and most chemical media, and it has excellent corrosion resistance and oxidation resistance. Under neutral and alkaline conditions, it has good dispersion stability, no obvious isoelectric point in the pH range of 2~11, and can be used for a long time in a complex chemical environment. It is not prone to corrosion, pulverization or performance degradation, and its service life is far longer than that of ordinary nano powder materials.

4. Electrical Characteristics: Semiconductor Characteristics, Suitable for the Electronic Field

Silicon carbide nano powder has good semiconductor properties and belongs to the wide band gap semiconductor materials. It has high electric field breakdown strength, high electron saturation mobility and radiation resistance. It can optimize electrical properties by adjusting particle size and morphology. Its dielectric constant is small, and its conductivity can be adjusted according to demand. It can be used as an insulation material or improved in conductivity through modification treatment, suitable for high-end electronic scenarios such as semiconductor devices and electronic packaging. It is one of the core basic materials in the silicon carbide semiconductor industry chain.

5. Processing characteristics: easy to composite, adaptable to multiple processes

Silicon carbide nano powder has high sintering activity. Under the hot pressing sintering condition at 1850 ℃, it can obtain 99.2% relative density and up to 580 MPa bending strength, which is easy to densify. At the same time, it has excellent compatibility with metals, ceramics, and polymer materials, is easy to disperse and composite, and can be directly applied without complex pretreatment. It can be combined with various substrates through processes such as mechanical alloying and in-situ combustion synthesis to prepare high-performance composite materials, suitable for various processing technologies such as 3D printing and coating preparation, and has extremely high application flexibility.

Application analysis of silicon carbide nano powder in many fields

Relying on its excellent comprehensive characteristics, silicon carbide nano powder is widely used in many high-end fields, such as semiconductor, composite materials, new energy, aerospace, covering industrial production, cutting-edge manufacturing and other scenarios. The specific applications are as follows:

1. Semiconductor and Electronic Field

As the core basic material of the silicon carbide semiconductor industry, silicon carbide nano powder is the key raw material for preparing silicon carbide wafers and semiconductor devices. Its high purity and narrow particle size distribution characteristics can improve the crystallization quality of silicon carbide wafers, assist in the preparation of high-frequency, high-power, low-energy semiconductor devices, and adapt to high-end scenarios such as 5G and new energy vehicles. Meanwhile, its excellent thermal conductivity and insulation properties can be used as electronic packaging materials and thermal interface materials, improving the heat dissipation efficiency of electronic devices and extending their service life; It can also be used to manufacture optoelectronic devices such as blue light-emitting diodes, laser diodes, and gas sensors, promoting the development of the electronics industry towards miniaturization and high performance.

2. Composite Materials Field (Core Application Scenarios)

SiC nano powder is a high-quality composite reinforcement, which can be widely used in the modification of metal matrix, ceramic matrix and polymer matrix composites. Adding a small amount of silicon carbide nano powder (about 5%) in the metal matrix composite can increase the hardness of aluminum alloy, copper alloy and other materials by more than 40%, significantly improve the tensile strength and wear resistance, and be used to manufacture high-end products such as aerospace parts, automobile steering parts and so on; In polymer materials, engineering plastics such as modified nylon and polyetheretherketone (PEEK) can increase their tensile strength by more than 150% and wear resistance by more than three times, making them suitable for wear-resistant scenarios such as mining machinery lining and textile machinery; In ceramic based composite materials, the toughness and thermal shock resistance of ceramics can be improved, which is used to manufacture high-end structural ceramics such as high-temperature gas turbine rotors and rocket nozzles.

3. New Energy Sector

In the field of new energy, the application scenarios of silicon carbide nano powder continue to expand. In the production of new energy batteries, it can be used as an electrode material additive to improve the conductivity and cycle life of the battery, and is suitable for products such as lithium batteries and fuel cells; In the field of photovoltaics, coating materials that can be used for photovoltaic modules can improve the photoelectric conversion efficiency of photovoltaic cells and enhance their resistance to ultraviolet radiation and aging; In addition, it can also be used for new energy equipment such as hydrogen production and storage, supercapacitors, etc. With excellent chemical stability and thermal conductivity, it helps the new energy industry develop towards high efficiency and energy conservation.

4. Other high-end fields

In the aerospace field, silicon carbide nano powder can be used to manufacture high-performance protective armor and aerospace devices. With its characteristics of high temperature resistance, wear resistance and lightweight, it can reduce the weight of devices and improve the reliability in extreme environments; In the field of precision machining, it can be used to prepare high hardness and wear-resistant powder coatings, grinding and polishing materials, with a grinding efficiency 12.12% higher than micron level silicon carbide, suitable for precision grinding of cutting tools and molds; In the field of chemical engineering, it can be used as a catalytic carrier and high-temperature filtration material for high-temperature synthesis and purification of chemical raw materials, improving reaction efficiency and product purity; In addition, it has strong absorption ability for infrared waves and can also be used for the preparation of absorbing materials and stealth materials.

Precautions for the use of silicon carbide nano powder

In order to give full play to the performance advantages of silicon carbide nano powder and extend its service life, in combination with its characteristics and application scenarios, attention should be paid to the sealing and storage in a dry and ventilated environment during the use process, to avoid moisture, exposure to the sun and violent collision, to prevent particle agglomeration, oxidation, and affect dispersion and performance; When using, it is necessary to select products with appropriate particle size and purity according to the application scenario. If dispersion needs to be improved, surface modification treatment can be carried out. Wear protective equipment such as dust masks and goggles during operation to avoid powder inhalation and ensure safe use. When composite with other materials, it is necessary to control the addition ratio to ensure the composite effect.

Supplier

RBOSCHCO is a trusted global silicon carbide nanopowder supplier & manufacturer with over 12 years of experience in providing super high-quality chemicals and Nanomaterials. The company export to many countries, such as USA, Canada, Europe, UAE, South Africa, Tanzania, Kenya, Egypt, Nigeria, Cameroon, Ugand, Turkey, Mexico, Azerbaijan Be lgium, Cyprus, Czech Republic, Brazil, Chile, Argentina, Dubai, Japan, Korea, Vietnam, Thailand, Malaysia, Indonesia, Australia, Germany, France, Italy, Portugal etc. As a leading nanotechnology development manufacturer, RBOSCHCO dominates the market. Our professional work team provides perfect solutions to help improve the efficiency of various industries, create value, and easily cope with various challenges. If you are looking for silicon carbide nanopowder, please feel free to contact us.