SILICA

SILICA

KONASIL, fumed silica is a fluffy, white powder of amorphous structure.

Because of its extremely small particle size and spherical morphology, high surface area, unique surface chemistry and high purity,
this product is being used in various industrial applications.

The average diameter of the spherical primary particle varies from 7 to 40nm by using different reaction conditions during flame hydrolysis.
There are various KONASIL grades with BET surface area between 50 and 380㎡/g.
MORPHOLOGY
DETAILS

MANUFACTURING PROCESS

Unit Hydrophilic Hydrophobic³ Analysis Method
K-90 K-150 K-200 K-300 K-121 K-122
Specific Surface Area m²/g 90±15 150±20 200±25 300±30 120±20 120±20 B.E.T
pH 3.7 ~ 4.7 3.7 ~ 4.7 3.7 ~ 4.7 3.7 ~ 4.7 3.7 ~ 5.5 3.7 ~ 5.5 4% Dispersion water⁴
Drying Loss¹ wt,% ≤1.0 ≤1.0 ≤1.5 ≤1.5 ≤0.5 ≤0.5 2 Hours at 105˚c
Ignition Loss¹ wt,% ≤1.0 ≤1.0 ≤1.5 ≤2.0 ≤2.0 ≤2.0 2 Hours at 1000˚c
g/l


50
100



50
100



50
100



50
100



50
90



50
90
325Mesh Residue wt,% <0.05 <0.05 <0.05 <0.05
HCI wt,% <0.025 <0.025 <0.025 <0.025 <0.05 <0.05
Carbon Contenr wt,% 0.6 - 1.2 0.6 - 1.2
SiO₂ -Content wt,% ≥99.8 ≥99.8 ≥99.8 ≥99.8 ≥99.8 ≥99.8
Al₂O₃² wt,% <0.05 <0.05 <0.05 <0.05 <0.05 <0.05
Fe₂O₃² wt,% <0.003 <0.003 <0.003 <0.003 <0.01 <0.01
TiO₂² wt,% <0.03 <0.03 <0.03 <0.03 <0.03 <0.03
      Note.1) Measure when Fumed silica id produced.
      2) Based on ignition at 1000℃
      3) Under R&D step
      4) 4% dispersion in water : methanol = 1:1 in hydrophobic grade.
      The given date are typical values, Specifications on request.
APPLICATION
01      CMP slurry abrasive 06      Unsaturated Polyester Resin (UPR) 11      Miscellaneous
02      Silicone rubber 07      Free Flow
03      Sealants, adhesives and caulks08      Heat and electric insulation
04      Rheology control09      Anti-plate-out
05      Unsaturated polyester gel coats10      Anti-blocking and anti-slip
MENUFATURING PROCESS