Silfit Z 91
Our premium Silfit Z 91 is derived from Sillitin Z 86 through a specialized thermal process. During this process, the crystal water in the kaolinite content is removed, resulting in the formation of new, almost amorphous mineral phases. The silica content remains stable at the applied temperature. The result: products with exceptionally high whiteness and impressive color neutrality – ideal for your application.
Product characteristics | Value | Unit | Testing method |
|---|---|---|---|
| Functionalization | untreated | ||
| Color values L* Color values a* Color values b* | 96.5 -0.2 1.0 | according to CIELAB | |
| Color wetted | Extra white | ||
| Particle size D50 Particle size D97 | 2.1 9.0 | µm | based on ISO 13320 |
| Residue > 40 µm | 10 | mg/kg | based on DIN EN ISO 787 Teil 18 |
| Volatile matter at | 0.2 | % | based on DIN EN ISO 787 Teil 2 |
| Electrical conductivity | 20 | µS/cm | based on DIN EN ISO 787 Teil 14 |
| pH Value | 6.5 | based on DIN EN ISO 787 Teil 9 | |
| Density Bulk density Tamped density | 2.6 0.30 0.55 | g/cm³ | based on DIN EN ISO 787 Teil 10 based on DIN ISO 903-1976 based on DIN EN ISO 787 Teil 11 |
| Spec. Surface area (BET) Oil absorption | 10 65 | m²/g g/100 g | based on DIN ISO 9277 based on DIN EN ISO 787 Teil 5 |
| Hardness silica/kaolinite Abrasivity | 7/4.5 40 | mg | based on Mohs based on Einlehner |
| Refractive index n | 1.55 | sin α / sin β | |
| Water solubility Acid solubility | < 0.5 < 1 | % | based on DIN EN ISO 787 Teil 3 based on DIN 53770 (0,1 N HCL) |
| Chemical Analysis SiO2 Al2O3 Fe2O3 | 86 13 < 1 | % | based on DIN 51001 (RFA) |
| Mineralogical Composition Neuburg silica Calcined kaolinite | 60 40 | % | based on X-ray diffraction pattern analysis combined with Rietveld |
| Equilibrium moisture content at 25°C and 50% relative humidity and 80% relative humidity and 90% relative humidity | 0.12 0.22 0.54 | % | based on DIN 66138 |
| Water absorption | not specified | ml/g | based on Baumann |
Packaging
Variant | Weight |
|---|---|
| Paper bag | 25 kg |
| EVA bag | 10 to 20 kg |
| Big bag type 1 | ≤ 600 kg |
| Big bag type 2 | ≤ 750 kg |
| Big bag type 3 | ≤ 900 kg |
| Bulk |
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