| CAS No.: | 7631-86-9 |
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| Formula: | Sio2 * Nh2o |
| EINECS: | 231-545-4 |
| Certification: | REACH |
| Environmental Protection: | Yes |
| Function: | Highly Reactive Form |
| Samples: |
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| Customization: |
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Audited Supplier Silica fume, also known as condensed silica fume or microsilica, is a spherical sub-micron amorphous silicon dioxide used in many applications.
Silica fume is a co-product of silicon or ferrosilicon production, consisting of ultrafine (sub-micron), amorphous, non-porous, perfectly spherical silicon dioxide (SiO2) particles, with purity levels of 85 to 99 %.
The main effect of these ultra-fine particles is to greatly improve particle packing and produce a highly pozzolanic reaction in concrete and other cementitious bond systems where the silicon dioxide reacts with calcium hydroxide, heightening performance levels and the strength and durability of these materials.
Additionally, silica fume, because of its amorphous (non-crystalline) structure and its specific area, provides other useful features to various applications, including improved sintering capabilities and enhanced high temperature performance of refractory castables, resulting in reactions between microsilica and other components of the refractory mix.
To summarize, silica fume has two key features which alone or in combination are the basis for its high performance:
High performance concrete with microsilica reduces construction time and provides structural advantages and durability for buildings, bridges, transport tunnels, roadways, etc.
Fiber cement with microsilica is used in roofing materials, such as flat and corrugated sheets, tiles, pipes and moldings for new structures or to efficiently help replace asbestos.
For refractory materials:
| model | YH-S516 | YH-300 | YH-300A | YH-300C | YH-300E |
| Particle size | 3.0-4.0 | 3.2-4.2 | 3.2-4.2 | 3.2-4.2 | 3.2-4.2 |
| Silica | >=98 | >=98 | >=98 | >=98 | >=98 |
| (After burning)% | |||||
| DBPOil absorption value cm3/g | 2.4-2.5 | 3.0-3.3 | 2.9-3.2 | 3.2-4.2 | 2.0-3.5 |
| pH value | 6-8 | 6-8 | 6-8 | 6-8 | 5-8 |
| Heating loss% | <=5 | <=5 | <=5 | <=5 | <=5 |
| Ignition loss % | <=6 | <=6 | <=6 | <=6 | <=6 |
| Porosity ml/g | 1.5 | 1.8 | 2 | 1.8 | 1.8 |
| Surface treatment | without | without | without | Inorganic | Inorganic |
| Type | Appearance | Specific surface area(BET) | PH-value | Loss on heating | Loss on ignition | Sieve residue | SiO2 content | Tamped density | Carbon content | Al2O3 mass fraction | TiO2 mass fraction | Fe2O3 mass fraction | Chloride content |
| m2/g | Wt% | Wt% | (45μm) | Wt% | g/L | Wt% | mg/kg | mg/kg | mg/kg | mg/kg | |||
| SS-150 | Fluffy white powder | 150±15 | 3.6-4.5 | <1.0 | <1.5 | <0.03 | >99.8 | 25-60 | <0.2 | ≤500 | ≤300 | ≤30 | |
| SS-200 | 200±30 | 3.7-4.5 | ≤1.5 | ≤2.0 | ≤250 | >99.8 | ≤50 | ≤2.0 | ≤400 | ≤200 | ≤30 | ≤250 | |
| SS-300 | 300±30 | 3.7-4.5 | ≤2.0 | ≤2.0 | ≤250 | >99.8 | ≤50 | ≤2.0 | ≤400 | ≤200 | ≤30 | ≤250 | |
| SS-380 | 380±30 | 3.7-4.5 | ≤2.0 | ≤2.0 | ≤250 | >99.8 | ≤50 | ≤2.0 | ≤400 | ≤200 | ≤30 | ≤250 |
| Package | Packed in multiple layer kraft paper 10kg bags on pallet, and should be stored in the original packaging in dry storage areas for protecting the material from volatile substance. | |||||||||
| Container | 20' GP : 1800KG, 10 pallets, 180KG/pallet 40' GP : 3600KG, 20 pallets, 180KG/pallet 40' HQ : 4000KG,20 pallets, 200KG/pallet |
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| Item No | characteristics | properties | Properties | Unit | Typical Value | Applications |
| BY-701 | BY-701 is surface-treated fumed silica with active silanol group modified by special silan. | Used as rheology control agent in composite liquid system; | Specific surface area, BET | m2/g | 150±15 | Paints & coatings |
| PH value in 4% dispersion | / | 4.0-6.0 | Plastics & Elastomers | |||
| Improve scratch resistance & abrasion resistance for paints & coatings ( UV coatings) | Loss on drying @ 105ºC×2h | wt.% | ≤1.5 | Dental composite materials | ||
| Enhance mechanical properties, strength of composite materials and plastics | Loss on ignition @ 1000ºC×2h | wt.% | ≥4.5 | |||
| SiO2 Content, based on ignited material |
wt.% | ≥99.8 | ||||
| Carbon Content | wt.% | 4.5-6.5 |
JSK alloy is a leading supplier of microsilica in China. Our microsilica is sourced from major producers of zirconia, silicon metal and ferrosilicon in China. The product has the characteristics of high pozzolanic activity, low LOI, etc. It can also provide special products with SiO2 content up to 96%, Cl content less than 0.1% and fluidity up to 22cm, etc. It is widely used in concrete, mortar, oilfield cementing, refractory materials, chemical fertilizer and other fields.
Packing: We can provide 1000kg jumbo bag and 10-25kg small bag packaging, including kraft paper bags and water-soluble paper bags, and can also be customized according to the special requirements of customers.
Our products comply with ASTM C 1240 and EN13263:2005 standards, and have been recognized by many testing authorities such as SGS, Exova and ENR ranking enterprises.
1.What kind of payment term do you support ?
T/T 30% in advance, 70% before delivery,we will take and show you every process details.
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