|LEVASIL® FX2040 N|
|Ammonia-stabilized larger particle colloidal silica|
|LEVASIL® FX2040 N is an ammonia-stabilized larger particle colloidal silica with very low sodium designed for high temperature, premium product applications where sodium alkali is detrimental. It is especially suited for saturation bonding and rigidizing (post impregnation) of specialty vacuum-formed fibrous refractories. LEVASIL® FX2040 N is a 40% concentration silica sol of 14 nanometer diameter amorphous spheres.|
|Better High Temperature Properties —||Ammonia-stabilized
particles give stable bonds at high temperatures producing less shrinkage
and less cristobalite at up to 2300°F.
|Best Product for Rigidizing —||Larger particles
soak in further and giver stronger, harder rigidized products; significantly
reduced sodium results in less shrinkage at end-use temperatures.
|Stronger Bonding and Hardness —||Larger particle
size yields higher green strengths (i.e., modulus of rupture) and harder
refractory fiber shapes.
|Saves Money —||Balanced silica
to starch floccing ratio is more economical giving high strength with less
colloidal silica in formulation.
|Flocs with Cationic Starch —||Negative surface
charge flocs cationic starch refractory fibers together to form a three
dimensional floc for good product strength.
|Typical Physical Properties|
|Consistency||Slightly viscous liquid|
|Specific Surface Area, m2/g||200|
|Particle Size, nm||14 (calculated)|
|pH @ 25°C||10.0|
|Viscosity @ 25°C, cp||13|
|Toxicity||Non-toxic. See SDS.|
|Packaging||Bulk tanks, 4000 gal; totes, 275 gal. ;drums, 55 gal; pails, 5 gal.|
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