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Product:
Nanometer Silicon Dioxide
Formula:
SiO2
CAS No.:
7631-86-9
Product No.:
SP1134
Package:
25Kg/Drum or in terms of customer's requirements.

Physicochemical Properties

Silicon dioxide occurs almost everywhere on earth. It is one of the most important and abundant oxides on earth, constituting about 60% weight of the earth’s crust as silica itself or in combination with other metal oxides in silicates. It commonly is found as sand in the vast ocean and river shores, their beds, deserts, rocks, and minerals.
Silicon dioxide exists in several structural forms: polymorphic crystalline silica, synthetic quartz crystals, amorphous silica, and vitreous silica. This classification is not complete as there are other forms of silica synthesized for specialized applications.

 

Specification

ITEM

SPECIFICATION

RESULT

Appearance

White powder solid

White powder solid

Assay %

 99

99.5

Grain Size, nm

15

Conformed

SSA,m²/g

200±50

Conformed

Sulphated assay (%) 950℃×2h

 6.0

Conformed

As  ppm

≤ 1.0

Conformed

Pb  ppm

≤ 10

Conformed

 

ITEM

SPECIFICATION

RESULT

Appearance

White powder solid

White powder solid

Purity  %

 99.0

Conformed

Grain Size, nm

30

Conformed

SSA,m²/g

1530

Conformed

PH value

5-7

Conformed

Sulphated assay (%) 950℃×2h

 6.0

Conformed

As  ppm

≤ 1.0

Conformed

Pb  ppm

≤ 10

Conformed

Hg  ppm

 1.0

Conformed

 

Applications and Usages

Manufacture of glass, water glass, refractories, abrasives, ceramics, enamels; decolorizing and purifying oils, petroleum products, etc.; in scouring- and grinding-compounds, ferrosilicon, molds for castings; as anticaking and defoaming agent.