| Model: | - |
|---|---|
| Brand: | HSF |
| Origin: | Made In China |
| Category: | Chemicals / Inorganic Chemical Materials / Oxide |
| Label: | SILICA FUME , silica |
| Price: |
-
|
| Min. Order: | - |
| Last Online:12 May, 2015 |
alan(at)minmetalseast(doc)com
Applications
•Refractory materials
•Paint, coating and printing ink
•Unsaturated polyester resins
•Adhesive and fluid sealant
•Cable rubber
•HCR high temperature sulfuration silicon rubber
•RTV room temperature sulfuration silicon rubber
Descriptions
Silica fume is an amorphous (non-crystalline) polymorph of silicon dioxide, silica. It is an ultrafine powder collected as a by-product of the silicon and ferrosilicon alloy production.
Physical and chemical Specifications
|
Properties / Grade |
HSF-1 |
HSF-2 |
HSF-3 |
|
SiO2 (%) |
≥ 94.0 |
≥ 92.0 |
≥ 90.0 |
|
ZrO2 (%) |
2 - 4 |
2 - 4 |
2 - 4 |
|
Fe2O3 (%) |
≤ 0.30 |
≤ 0.40 |
≤ 0.40 |
|
Al2O3 (%) |
≤ 0.30 |
≤ 0.40 |
≤ 0.40 |
|
Na2O (%) |
≤ 0.01 |
≤ 0.01 |
≤ 0.01 |
|
K2O (%) |
≤ 0.02 |
≤ 0.02 |
≤ 0.02 |
|
CaO (%) |
≤ 0.002 |
≤ 0.002 |
≤ 0.002 |
|
MgO (%) |
≤ 0.005 |
≤ 0.005 |
≤ 0.005 |
|
TiO2 (%) |
≤ 0.07 |
≤ 0.07 |
≤ 0.07 |
|
Loss on ignition (%) |
≤ 0.50 |
≤ 0.50 |
≤ 0.60 |
|
Whiteness |
≥ 88 |
≥ 80 |
≥ 70 |
|
BET (m2/g) |
4 - 10 |
4 - 15 |
5 - 15 |
|
D50(µm) |
1 - 2 |
2 - 4 |
3 - 6 |
|
pH |
2 - 4 |
2 - 4 |
2 - 4 |
