Silfit Z 91 in inorganic chemicals

Calcined product based on Sillitin Z 86.

Silfit Z 91 offers highest brightness and color neutrality.

 

  • high chemical and acid resistance
  • good mechanical properties (high strength)
  • high color neutrality
  • adjustable rheology through selection of product (additives can be reduced)
  • also suitable for food contact and drinking water applications (as per FDA and BfR regulations)
Product characteristics Unit SILFIT Z 91
Functionalization untreated
Color values L*
Color values a*
Color values b*
96.5
- 0.2
1.0
Particle size D50
Particle size D97
µm
2.1
9,5
Residue > 40 µm
mg/kg
10
Volatile matter at 105 °C % 0.2
Electrical conductivity µS/cm 20
pH Value 6.5
Density
Bulk density
Tamped density
g/cm³
2.6
0.30
0.55
Spec. Surface area (BET)
Oil absorption
m²/g
g/100 g
10
65
Hardness silica/kaolinite
mg
7/4.5
Refractive index n 1.55
Water solubility
Acid solubility
%
< 0.5
< 1
Chemical Analysis:
SiO2
Al2O3
Fe2O3
%
86
13
< 1
Mineralogical Composition:
Neuburg silica
Calcined kaolinite
%
60
40
Equilibrium moisture content at 25°C
and 50% relative humidity
and 80% relative humidity
and 90% relative humidity
%
0.12
0.22
0.54
Water absorption ml/g not specified

In order to make available to you the most important information about our products at all times, you will find here the Material Specification.

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The aspects to observe when working with our products are detailed in our Material Safety Data Sheet, which also can be downloaded.

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