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Physical & Chemical properties

Particle size distribution (Granulometry)

Administrative data

Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
18 February 2016
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Reference
Reference Type:
other company data
Title:
Unnamed
Year:
2017
Report date:
2017

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Within this study, Microtrac equipment was used to perform full channel analysis of particle size distribution
GLP compliance:
not specified
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution

Test material

Constituent 1
Chemical structure
Reference substance name:
ytterbia stabilised yttrium disilicate
Molecular formula:
Yb2-xYxSi2O7
IUPAC Name:
ytterbia stabilised yttrium disilicate
Test material form:
solid: particulate/powder
Details on test material:
Name: ytterbium doped yttrium disilicate
Physical state: solid
Appearance: white powder
Further information on test material confidential.

Results and discussion

Particle sizeopen allclose all
Key result
Percentile:
D10
Mean:
10.6 µm
Remarks on result:
other: average of 3 runs
Key result
Percentile:
D50
Mean:
25.33 µm
Remarks on result:
other: average of 3 runs
Key result
Percentile:
D90
Mean:
50.25 µm
Remarks on result:
other: average of 3 runs

Any other information on results incl. tables

Summary of results are as follows:

 Data  Value
 MV (µm)  28.96
 MN (µm)  3.38
 MA (µm)  18
 CS  3.33E-01
 SD  14.93
 Mz  27.23
 si  15.78
 Ski  0.2693
 Kg  1.127

Percentiles:

 d(i)  d(µm)
 10  10.60
 20  14.79
 30  18.32
 40  21.77
 50  25.33
 60  29.25
 70  33.81
 80  39.83
 90  50.25
 95  62.31

Summary of peak:

 d(µm)  Volume in %  Width
 25.33  100  29.86

Applicant's summary and conclusion

Conclusions:
Based on the full channel analysis of particle size distribution performed for a representative sample of ytterbium doped yttrium disilicate, the D10, D50 and D90 values were 10.60, 25.33 and 50.25 µm, respectively.