Silfit Z 91 in friction linings

Calcined product based on Sillitin Z 86.

Silfit Z 91 offers high color neutrality.

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
Electrical conductivity	µS/cm	acc. to DIN EN ISO 787 part 14	20
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.

Name	Short Description
SILLITIN V 85	Standard product.

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