Specifications

Kemitura | Specifications

Specifications

Typical General Properties
• Apperance – Fluffy white powder
• Crystal structure of SiO2 – Amorphous

Hydrophilic Grades

Property 120 150 200 300 380
SiO2 min. wt% 99,9 99,9 99,9 99,9 99,9
Fe2O3 max. wt% 0,003 0,003 0,003 0,003 0,003
Al2O3 max. wt% 0,05 0,05 0,05 0,05 0,05
TiO2 max. wt% 0,03 0,03 0,03 0,02 0,02
pH value 3,6-4,5 3,6-4,5 3,6-4,5 3,6-4,5 3,6-4,5
Loss on drying
max. wt% (2hrs at 105°C)
1,0 1,0 1,0 1,5 1,5
Ignition loss max.
wt% (2hrs at 1000°C)
1 1 1 2 2
Bulk density, g/dm3 40-60 40-60 40-60 40-60 40-60
compacted density, g/dm3 120-140 120-140 120-140 110-140 -
BET surface area, m2/g 120±20 150±20 200±25 300±30 380±40
Sieve residue max.
wt% (acc. to Mocker 4,5μm)
max. 0,06 max. 0,06 max. 0,04 max. 0,04 max. 0,05

Hydrophobic Grades

Property AM-1-120 AM-1-175 AM-2-120
SiO2 min. wt% 99,0-99,3 99,0-99,5 99,00-99,5
Fe2O3 max. wt% 0,01 0,01 ≤ 0,01
Al2O3 max. wt% 0,05 0,05 ≤ 0,05
TiO2 max. wt% 0,03 0,03 ≤ 0,03
pH value ≥ 3,9 ≥ 3,9 ≥ 3,6
Loss on drying
max. wt% (2hrs at 105°C)
< 0,5 < 0,5 -
Ignition loss max.
wt% (2hrs at 1000°C)
≤ 2 ≤ 2 ≤ 6,2
Bulk density, g/dm3 40-50 40-50 50-60
compacted density, g/dm3 51-100 51-100 -
BET surface area, m2/g 120±20 * 170±25 * 110 ±20
Hydrophobicity % ** > 99,0 > 99,0 > 99,0

* is not normalized, but actually maintained
** at boiling in the water for 30 min.

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