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Particle size distribution (Granulometry)

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Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2016-06-21
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Qualifier:
according to
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Version / remarks:
2009
Deviations:
no
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of distribution:
other: Laser diffraction in water as dispersion liquid.
Mass median aerodynamic diameter:
154.66 µm
Percentile:
D10
Mean:
69.84 µm
St. dev.:
3.5
Remarks on result:
other: "According to ISO 13320 the relative standard deviation for d50 is smaller than 3 %, for d10 and d90 smaller than 5 %. For powders below 10 µm these maximum values should be doubled."
Key result
Percentile:
D50
Mean:
154.66 µm
St. dev.:
4.6
Remarks on result:
other: "According to ISO 13320 the relative standard deviation for d50 is smaller than 3 %, for d10 and d90 smaller than 5 %. For powders below 10 µm these maximum values should be doubled."
Percentile:
D90
Mean:
255.05 µm
St. dev.:
12.7
Remarks on result:
other: "According to ISO 13320 the relative standard deviation for d50 is smaller than 3 %, for d10 and d90 smaller than 5 %. For powders below 10 µm these maximum values should be doubled."
Conclusions:
The mean value of particle size of chromium diboride is 154.66 μm.
Executive summary:

The granulometric properties of chromiun diboride were analysed by laser diffraction method according to ISO 13320-2009. Therefore, a sample of the test substance chromium diboride was dispersed in water and Fraunhofer approximation was used for calculation of particle size distribution (PSD). The results of the PSD for chromium diboride was as follows:

D (v, 0.1) = 69.84 μm

D (v, 0.5) = 154.66 μm

D (v, 0.9) = 255.05 μm

Description of key information

The median value of particle size of Chromium diboride was determined to be 154.66 µm.

Additional information

The granulometric properties of Chromium diboride were analysed by laser diffraction method according to ISO 13320-2009. Therefore, a sample of the test substance Chromium diboride was dispersed in water and Fraunhofer approximation was used for calculation of particle size distribution (PSD). The results of the PSD for Chromium diboride was as follows:

D (v, 0.1) = 69.84 μm

D (v, 0.5) = 154.66 μm

D (v, 0.9) = 255.05 μm