Silicon Dioxide (SiO2) Micropowder, Silica Powder

Product Overview


Synonyms: Pure Crystalline Silica Powder, Quartz Nanopowder, SiO2 Nanoparticles, Silicic oxide Micropowder,

We also produce Precipitated Silica(White Carbon Black).

Chemical Formula: SiO2

CAS Number: 7631-86-9

EINECS Number: 231-545-4

Silicon Dioxide (SiO2) MicropowderSilicon powder is a non-toxic, tasteless, non-metallic mineral powder, made from natural quartz or fused quartz by crushing, ball milling (or vibrating, air milling), flotation, acid pickling purification, high-purity water treatment and other processing. It has features of high hardness, low oil absorption, easy to disperse, not easy to precipitate, strong stability, acid corrosion resistant, and so on. Therefore, it is widely used in chemical, electronic, integrated circuit (IC), electrical appliance, plastic, coating, advanced paint, rubber, national defense and other fields. With the rapid development of high-tech field, Silicon dioxide micropowder will also enter a new period of historical development.




Product Data


Product Code Median diameter Oil absorption value Refractive index pH value
L020 44 μm 16 1.55 7.0
L032 19 μm 19 1.55 7.0
L050 13 μm 20 1.55 7.0
L070 10 μm 21 1.55 7.0
L125 5 μm 23 1.55 7.0
L250 2.7 μm 26 1.55 7.0
L800 1.3 μm 29 1.55 7.0


Product Code Median diameter Oil absorption value Refractive index pH value
H032 19 μm 18 1.54 7.0
H050 13 μm 19 1.54 7.0
H070 10 μm 20 1.54 7.0
H125 5 μm 21 1.54 7.0
H300 2.7 μm 25 1.54 7.0
H800 1.3 μm 29 1.54 7.0

If the above median diameter is not what you need, we can customize.

Silicon Dioxide (SiO2) Micropowder Composition

We are the largest manufacturer of ultra-fine silica powder produced by jet milling in South China. ANYWHERE POWDER silica powder is using high purity siliceous minerals as raw material, producing with wave and airflow impact of near zero pollution.

Chemical Composition

Composition SiO2 Al2O3 Fe2O3 MgO CaO NaO
Average value >99.3% ≤0.07 ≤0.01 ≤0.01 ≤0.01 ≤0.01

Features: Acid and Alkali Resistant, High Insulation, Environmental Protection, Ultra White, High Flame Retardant, High Purity, Low Expansion, High Thermal Conductivity, Strong Weather Resistant, Particle Size Even, Corrosion Resistant, Ultra Fine.


ANYWHERE POWDER Silicon Dioxide Micropowders vs. Others

Median diameter Mainly 10~53μm, fewer small size grades 1.3~45μm, many grades 1.3~45μm, many grades
Big particle Contain, have high potential risk NO big particle NO big particle
Microscopic shape non-spherical Nearly spherical Nearly spherical
Particle-size distribution wide range, hard to control narrow range, D50<½D97 narrow range, D50>½D97
Purity Contain non-quantitative heavy metals, high Fe-Al content High purity, high whiteness Ultra purity, ultra whiteness
Price Primitive process, poor quality, high price Mature process, large capacity, good Cost-Performance ratio Higher, better Cost-Performance ratio
Application Narrow areas, mainly middle-end and low-end mainly middle-end, less high-end Wide area, mainly high-end

Our Silicon Dioxide Test Report

Standard value Test result value Test result
SiO2 ≥99.2% 99.6% Passed
Loss on ignition ≤0.3% 0.16% Passed
Oil absorption value ≤25 g/100g 22 g/100g Passed
Whiteness at ambient temperature ≥94% 95.6% Passed
D97 particle size ≤25 μm 20.1 μm Passed
D50 particle size 8.5(±2.5) μm 9.0 μm Passed
Aluminium oxide ≤0.05% 0.01% Passed
Iron oxide ≤0.01% <0.01% Passed
Mohs hardness 7 7 Passed
pH value 5.0-7.0 7 Passed
Heavy metal <100mg/kg / Passed

sio2 test report


Silicon Dioxide (SiO2) Micropowder Applications

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