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Spherical silica powder CAS 7440-21-3
  • Spherical silica powder CAS 7440-21-3

Spherical silica powder CAS 7440-21-3

Spherical silicon powder is purified by natural quartz(SiO2)or fused quartz(amorphous SiO2 after natural quartz has been melted and cooled at high temperature) after crushing,ball milling (or vibration,jet milling),flotation,pickling purification,and high purity water Processing and other processes are processed.Spherical silicon powder has the characteristics of high purity,narrow particle size distribution,high sphericity,and low cut point.
Purity:99.9%
Shape:spherical
Size:300nm
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Overview of spherical silica powder:

Spherical silicon powder is a non-toxic,odorless,non-polluting inorganic non-metallic material.It is made of natural quartz(SiO2)or fused quartz (amorphous SiO2 after high temperature melting and cooling of natural quartz) after being crushed and ball milled( Or vibration,jet mill),flotation,pickling purification,high-purity water treatment and other processes.In short,ultrafine pulverization and purification are two important links in the preparation of silicon micropowder.Natural quartz mineral contains a large number of inclusions and cracks.The use of ultra-fine pulverization technology can greatly reduce the number of cracks and defects.Combined with the purification process,the content of harmful impurities can be better reduced.In terms of current pulverization technology,the equipment available for natural quartz minerals includes ball mills,stirring mills,jet mills,and vibration mills.Ball mill and vibrating mill plus classifier system,the product particle size is small and the system adjustment is more flexible.

As a functional powder filling material with excellent performance,silicon micropowder is widely used in the copper clad laminate industry,epoxy plastic packaging material industry,electrical insulation material industry and adhesive industry,etc.The rapid development of downstream copper clad laminate and epoxy plastic packaging materials has stimulated silicon The demand for micro-powder continues to increase.With the promotion of 5G and the semiconductor industry,related products are developing in a more sophisticated direction,and the requirements for the performance and quality of silicon micropowder are getting higher and higher,and mass production can be formed.

Application of spherical silica powder:

What are the uses of spherical silica powder?

Spherical silicon micropowder technology is a natural high-quality powdered quartz mineral as the basic raw material. It is made by two main processes:1.Using sol-gel technology,in the presence of dispersant and spherical catalyst,it is prepared to meet the requirements of electronic packaging materials The high-purity spherical nano-amorphous silicon powder;2,the use of flame method or ion flame method to melt into spherical amorphous silicon powder.In the high-end user market,such as integrated circuit packages are made using the second process.

Spherical silicon powder is mainly used for large-scale integrated circuit packaging.It is also used in high-tech fields such as aviation,aerospace,fine chemicals,rewritable discs,large-area electronic substrates,special ceramics and daily cosmetics.It is used in epoxy resin systems.As a filler,it can save a lot of epoxy resin.The market prospect of spherical silica powder is broad. Experts predict that by 2010,my country's demand for spherical silicon powder alone will reach 20,000 to 30,000 tons,and high-purity silicon powder will be 100,000 tons,with an average annual growth rate of more than 20%.The world's demand for spherical silica powder will exceed 300,000 tons,worth tens of billions.With the rapid development of my country's microelectronics industry,large-scale and ultra-large-scale integrated circuits have higher and higher requirements for packaging materials,not only requiring ultra-fine,but also requiring high purity,especially for particle shapes.

The price of spherical silica powder:

Why spheroidize? First of all ,the surface of the ball has good fluidity,which is uniformly mixed with the resin to form a film.The amount of resin added is small,and the fluidity is the best.The filling amount of the powder can reach the highest,and the weight ratio can reach 90.5%.Therefore,spheroidization means silicon powder With the increase of the filling rate,the higher the filling rate of silicon micropowder,the smaller the thermal expansion coefficient and the lower the thermal conductivity,and the closer to the thermal expansion coefficient of monocrystalline silicon,the better the performance of electronic components produced therefrom.Secondly,the spheroidized plastic molding compound has the least stress concentration and the highest strength.When the stress concentration of the angular powder molding compound is 1,the stress of the spherical powder is only 0.6.Therefore,when the spherical powder molding compound encapsulates the integrated circuit chip,the yield rate High,and it is not easy to produce mechanical damage during transportation,installation and use.Third,the spherical powder has a small friction coefficient and less wear on the mold, which makes the mold have a long service life.Compared with the angular powder,the service life of the mold can be doubled.The packaging mold of the plastic compound is expensive.

The price of spherical silica powder varies randomly with production costs, transportation costs, international conditions, exchange rates, and market supply and demand of spherical silica powder. Tanki New Materials Co. ,Ltd aims to help all industries and chemical wholesalers find high-quality products by providing a full range of products. If you are looking for spherical silica powder, please contact us for the latest price of spherical silica powder.

Suppliers of spherical silica powder:

As a global supplier ofspherical silica powder,Tanki New Materials Co.,Ltd has extensive experience in the performance,application and cost-effective manufacturing of advanced and engineered materials.The company has successfully developed a series of powder materials(including boron carbide),Aluminum carbide,titanium carbide,etc.),high-purity targets,functional ceramics and structural devices,and provide OEM services.


Hot Tags: Spherical silica powder CAS 7440-21-3, manufacturers, suppliers, factory, Customized
Technical Parameter of Spherical quartz powder Spherical SiO2:
Test ItemsUnitTypical valueTest Method
Chemical CompositionSiOB2B%99.9Weight Method
FeB2BOB3Bppm105Spectrophotometer
Moisture%0.08Weight Method
Whiteness%94.5Whiteness Meter
Extraction WaterEcμS/cm13Conductivity Meter
Na+ppm0.7Atomic Absorption Spectrometer
Cl-ppm0.4Auto Electric Potential Titrator
pH/4.2PH Meter


Spherical quartz powder Spherical SiO2 Properties
Other NamesFused quartz, spherial quartz, spherical SiO2, silica
CAS No.7631-86-9
Compound FormulaSiO2
Molecular Weight60.09
AppearanceWhite Powder
Melting Point1,600° C (2,912° F)
Solubility in waterN/A
Density2533 kg/m3
Purity99.5-99.9%
Particle Size10-30nm
Boling point2,230° C (4,046° F)
Specific HeatN/A
Thermal ConductivityN/A
Thermal ExpansionN/A
Young's ModulusN/A
Exact Mass59.9668 g/mol
Monoisotopic Mass59.967 Da
Spherical quartz powder Spherical SiO2 Health & Safety Information
Safety WarningDanger
Hazard StatementsN/A
Flashing pointNot applicable
Hazard CodesN/A
Risk CodesN/A
Safety StatementsN/A
RTECS NumberN/A
Transport InformationNONH
WGK GermanyNONH




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