Calcined product based on Sillitin Z 86.
Silfit Z 91 offers balanced profile of properties.
- very low sieve residue in ppm range
- excellent dispersion properties
- very good extrusion properties
- high tensile strength
- avoids mold fouling/deposits on dies caused by filler
- good resistance to oil, water and acid
- very high electrical resistivity, even after storage in water
- very low dielectric loss, even after storage in water, even without additional silane
| Product characteristics | Unit | Testing method | SILFIT Z 91 |
|---|---|---|---|
| Functionalization | untreated | ||
|
Color values L*
Color values a*
Color values b*
|
acc. to CIELAB |
96.5
- 0.2
1.0
|
|
|
Particle size D50
Particle size D97
|
µm | acc. to ISO 13320-1 |
2.1
9,5
|
|
Residue > 40 µm
|
mg/kg | acc. to DIN EN ISO 787 part 18 |
10
|
| Volatile matter at 105 °C | % | acc. to DIN EN ISO 787 part 2 | 0.2 |
| pH Value | acc. to DIN EN ISO 787 part 9 | 6.5 | |
|
Density
Bulk density
Tamped density
|
g/cm³ |
acc. to DIN EN ISO 787 part 10
acc. to DIN ISO 903-1976
acc. to DIN EN ISO 787 part 11
|
2.6
0.30
0.55
|
|
Spec. Surface area (BET)
Oil absorption
|
m²/g
g/100 g
|
acc. to DIN ISO 9277
acc. to DIN EN ISO 787 part 5
|
10
65
|
|
Hardness silica/kaolinite
|
mg |
acc. to Mohs
|
7/4.5
|
| Refractive index n | sin α / sin β | 1.55 | |
|
Water solubility
Acid solubility
|
% |
acc. to DIN EN ISO 787 part 3
acc. to DIN 53770 (0,1 N HCL)
|
< 0.5
< 1
|
|
Chemical Analysis:
SiO2
Al2O3
Fe2O3
|
% | acc. to DIN 51001 (RFA) |
86
13
< 1
|
|
Mineralogical Composition:
Neuburg silica
Calcined kaolinite
|
% | Based on X-ray diffraction pattern analysis combined with Rietveld |
60
40
|
|
Equilibrium moisture content at 25°C
and 50% relative humidity
and 80% relative humidity
and 90% relative humidity
|
% | acc. to DIN 66138 |
0.12
0.22
0.54
|
| Water absorption | ml/g | acc. to Baumann | 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.
The aspects to observe when working with our products are detailed in our Material Safety Data Sheet, which also can be downloaded.
All information about material characteristics, application fields and benefits can be found in this Technical Data Sheet and is also for download available here.