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Fumed silica SiO2

time:2013-05-08 09:21 from:未知 author:admin
Fumed silica SiO2
Introduction of fumed silica:
Fumed silica is a high value-added fine chemical product; it is a white, loose, amorphous, non-toxic, non-polluting inorganic non-metallic oxide.The primary particle size betweens 7 ~ 40nm and the specific surface area is generally greater than 100m2 / g. Because of its nano-effects, in the material the fumed silica exhibits excellent properties of reinforcing, thickening, thixotropic, insulation, matting, anti-sagging, which are widely used in the silicone rubber (polyester plastics, sealing materials, etc.), silicone glue (adhesives, paints, coatings, etc.) and high-performance fibers, new synthetic unsaturated resin, electric insulation, inks, pharmaceuticals, paper, food, cosmetics, chemical mechanical polishing, etc., to be known as the "industrial MSG".

                                       
Fumed Silica Standard Comparative Table
    
ITEM Q/SSG01-2012 GB/T 20020-2013
AQ70 AQ90 AQ110 AQ150 AQ200 AQ250 AQ300 AQ380 A50~A380
SiO2z Mass Fraction % ≥ 99.8 99.8
PH-value (4%) 3.7-4.5 3.7-4.5
Specific surface area,m2/g 70±10 90±10 110±15 150±15 200±20 250±20 300±30 380±30 typical value±30
Loss on heating%≤ 1 1 1 1 1.5 1.5 2 2 3
Loss on ignition%≤ 1.5 1.5 1.5 1.5 2 2 2 2 2.5
Sieve residue (45μm)%≤ 0 0.03 0.03 0.03 0.04 0.04 0.04 0.04 0.025
Tamped density g/L ≤ 50 50 50 50 50 50 50 50 /
Al2O3 mass fractionmg/kg ≤ 500 500 500 500 500 500 500 500 400
TiO2 mass fractionmg/kg ≤ 300 300 300 300 300 300 300 300 200
Fe2O3 mass fraction mg/kg ≤ 30 30 30 30 30 30 30 30 30
Chloride content%≤ 0 0.03 0.03 0.025 0.03 0.03 0.03 0.03 0.025
Carbon content%≤ 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2

Fumed Silica Application:
◇ As a liquid thixotropic and thickening agents, anti-settling, anti-sagging;
◇ Improve filler pigment in a liquid suspension systems and dispersion;
◇ Used as a dispersing and grinding aids;
◇ Iprove the corrosion resistance of the coating;
◇ Improve the powder flow ability, storage stability;
◇ Improve the powder charge amount and charge stability;
◇ Improve water resistance;
◇ Improve the scratch resistance of the film;
◇ Improve the color vividness;
◇ Fixed special effects;
◇ Improve the film mechanical properties;
◇ Improve film adhesion and flexibility;
◇ Improve rubber, elastomeric, viscoelastic properties, reinforcement;
◇ Deformers deforming effect;
◇ Iprove the coating surface hardness, scratch resistant;
◇ Elastomeric film and preventing adhesion;
◇ As an adsorbent and a carrier;
◇ Coating for inkjet printing;
◇ As a senior dental filling material;
◇ As a catalyst carrier, significant thermal insulation, for low and high temperature insulation.


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