Manufacturers supply micro silica powder construction chemical electronic medicine special

Micro silica ,also called silica fume or micro silica, is a byproduct of production silicon metal or ferrosilicon alloys. Silicon metal and alloys are produced in electric furnaces.The raw materials are quartz,coal and woodchips.The smoke that results from furnace operation is collected and sold as silica fume, silica fume consists primarily of amorphous(noncrystalline) silicon dioxide(SiO2),its average granule diameter is 0.15~0.20um,specific surface area is 15000~20000m2/kg,and it has extremely strong surface active.

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silica fume powders

micro silica fume

fly ash silica fume silica fume powders

silica fume production

Application

Cementitous Repair Products (Mortars & Grouts)Low permeability, increase resistance from chlorides, acids, nitrates and sulfate etc2) Oil Well GroutingIncrease durability and compressive strength, decrease permeability, better control of gas leakage3) Concrete Tile, roofing & wallboard,panels Lightweight and improve the strength4) other application, such as waterglass industry, thermal insulation material etc.
Properties

1.with good insulation: due to the high purity of silicon powder, low impurity content, stable performance, excellent electrical insulation performance, so that the cured material has good insulation properties and arc resistance.
2.can reduce the peak exothermic temperature of epoxy resin curing reaction, reduce the linear expansion coefficient and shrinkage rate of the cured material, so as to eliminate the internal stress of the cured material and prevent cracking.

3. corrosion resistance: silicon powder is not easy to react with other substances, and most acids, alkali can not react chemically, its particles are evenly covered on the surface of the object, with strong corrosion resistance.

4.Reasonable particle grading, which can reduce and eliminate precipitation and delamination when used; It can enhance the tensile and compressive strength of the cured material, improve the wear resistance, increase the thermal conductivity of the cured material, and increase the flame retardant property.
5.the silicon powder treated by silane coupling agent has good infiltration of various resins, good adsorption performance, easy to mix, no clumping phenomenon.
6. silicon powder as a filler, added to the organic resin, not only improve the performance of the cured material, but also reduce the cost of the product.
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