Registration Dossier

Diss Factsheets

Physical & Chemical properties

Particle size distribution (Granulometry)

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
24 April 2017
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Qualifier:
no guideline followed
Principles of method if other than guideline:
Within this study, the distribution of sizes of the particles within the sample was determined using a Malvern Mastersizer 2000. The theory used was the Fraunhofer model. This model can predict the scattering pattern that is created when a solid, opaque disc of a known size is passed through a laser beam.
GLP compliance:
not specified
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution
Key result
Percentile:
D10
Mean:
71.182 µm
Remarks on result:
other: Average of 3 runs
Key result
Percentile:
D50
Mean:
288.911 µm
Remarks on result:
other: Average of 3 runs
Key result
Percentile:
D90
Mean:
555.382 µm
Remarks on result:
other: Average of 3 runs

Detailed results of this analysis are as follows:

- Concentration: 0.1161 % vol

- Span: 1.676

- Uniformity: 0.497

- Results units: volume

- Specific surface area: 0.0749 m²/g

- Surface weighted mean D[3,2]: 80.092 µm

- Volume weighted mean D[4,3]: 306.837 µm

The D(0.00) and D(1.00) values are 1.13 µm and 888.25 µm respectively.

 

Conclusions:
The d10, d50 and d90 of a representative sample of yttrium metal powder were determined to be 71.182 μm, 288.911 µm, and 555.382 µm, respectively, using a Malvern Mastersizer 2000.

Description of key information

Based on an experimental study (Treibacher Industrie AG, 2017, Klimisch score 1), the d10, d50 and d90 of a representative sample of yttrium metal were determined to be 71.182 μm,  288.911 µm, and  555.382 µm, respectively, using a Malvern mastersizer 2000.

Additional information

d10 = 71.182 µm, d50=288.911 µm, d90=555.382 µm