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Physical & Chemical properties

Particle size distribution (Granulometry)

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Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Qualifier:
according to guideline
Guideline:
other: ISO 13320:2009
Deviations:
not specified
Principles of method if other than guideline:
The sample is dispersed in air directly in the measuring chamber, using the SCIROCCO sampling unit. The dry powder sample is manually placed in the sample hopper with the air supply and vacuum extration system connected. When the sample hopper is vibrated, the sample travels down the hopper until it eventually falls into the main feed mechanism. The rate at which sample is fed is controlled by the feed rate control, on the front panel, and the gap between the feed gates on the hopper. At the entrance to the main feed mechanism, there is a wire sieve filled with ball bearings. The bearings smooth the flow of sample as they effectively store particles within the array for a brief period. The vibrating bearings also break up loose agglomerates within the sample. As the sample falls through the sieve it is accelerated by compressed air. It then passes through tubing in the dispersion unit where agglomerates are further broken up. The sample is then fired through the air cell fitted to the Mastersizer, where it is measured. It is collected by the vacuum extraction system as the rear of the air cell.
GLP compliance:
yes (incl. QA statement)
Type of method:
sieving
Type of distribution:
volumetric distribution
Geometric standard deviation:
ca.
Percentile:
other: volume mean diameter
Mean:
43.078 µm
Remarks on result:
other: no deviation
No.:
#1
Size:
ca. 85.677 µm
Distribution:
ca. 90 %
No.:
#2
Size:
ca. 36.181 µm
Distribution:
ca. 50 %
No.:
#3
Size:
ca. 11.398 µm
Distribution:
ca. 10 %
Conclusions:
The volume mean diameter of sample labelled as KERASTIM S is 43.078 µm and its 90%, 50% and 10% cumulative
size distributions are 85.677 µm, 36.181 µm and 11.397 respectively.
Executive summary:

The granolumetry was determined according ISO 13320:2009 method.

The volume mean diameter of sample labelled as KERASTIM S is 43.078 µm and its 90%, 50% and 10% cumulative size distributions are 85.677 µm, 36.181 µm and 11.397 respectively.

Description of key information

The granolumetry was determined according ISO 13320:2009 method.

The volume mean diameter of sample labelled as KERASTIM S is 43.078 µm and its 90%, 50% and 10% cumulative size distributions are 85.677 µm, 36.181 µm and 11.397 respectively.

Additional information