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What is the main use of nano spherical silicon powder, and how to make nano spherical silicon powder

wallpapers Tech 2021-01-15
Spherical silicon is also known as spherical silicon dioxide, spherical silicon powder, etc. in the industry. Spherical silica powder is a white powder with relatively high purity, very fine particles, good dielectric properties and thermal conductivity, and has the advantages of low expansion coefficient, and has strong development potential. When the spherical silicon powder is used in the current integrated circuit, the purity requirements become more and more stringent. Under normal circumstances, the silicon content cannot be lower than 99.95%.
Characteristics and performance of spherical silica powder products
Spherical silicon is produced by the flame fusion method. Spherical silicon dioxide is produced by silica at a very high-temperature flame. It has the characteristics of high purity, low radioactivity, good fluidity, and low thermal stress.
Nano spherical silicon is spherical crystalline silicon particles with high sphericity and high roundness. It has the characteristics of high purity, small particle size, uniform distribution, large specific surface, high fluidity, insulation, high surface activity, and low bulk density.
Spherical silicon is non-toxic, odorless, and has good activity. It is a new generation of optoelectronic semiconductor materials with a wide gap energy semiconductor and is also a high-power light source material.
Spherical silicon has excellent properties such as high dielectric, high heat resistance, high humidity resistance, high filling content, low expansion, low stress, low impurity, and low friction coefficient.
The main application areas of spherical silica
Spherical silica is widely used in aviation, aerospace, semiconductor, electronic components and other materials.
It can be added as a filling material with phenolic epoxy resin, adhesive, paint, high-grade ceramics, coatings, rubber, silica gel to reduce costs, increase weather resistance, hardness, etc.
Spherical silica can be added to products such as binders, catalysts, medicines, castings, and packaging materials.
Spherical silica has a low thermal shrinkage rate. Adding to PVC, PP, PE and other plastic products will not affect the color and feel, reduce thermal shrinkage and prevent warpage.
How to prepare spherical silica
Spherical silica production methods are flame ball method, high-temperature melt spray method, gas phase method, gel method, a spray method, emulsion method, precipitation method and other production methods. Product performance and application range are different.
At present, the methods for preparing spherical silica powder mainly include chemical preparation methods such as chemical vapor method, chemical precipitation method, high-frequency plasma method, high temperature melting spray method and sol-gel method.
Observing the microstructure of spherical silica can summarize the spherical mechanism of spherical silicon powder, which can guide spherical silicon powder manufacturers to improve production technology and improve product quality.
Storage conditions of nano spherical silicon
Nano-spherical silicon (spherical silica) should be sealed and stored in a dry and cool environment. It should not be exposed to the air for a long time to prevent agglomeration due to moisture and affect the dispersion performance and use effect. In addition, avoid heavy pressure and do not contact with oxidants. , But because of its non-toxicity, it can be transported as ordinary cargo during transportation.
The nano-spherical silica is packaged in white woven bags and paper drums, with a PVC moisture-proof inner membrane and a waterproof outer layer.

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