Grinding products, Oxides, Salts

Grinding products, Oxides, Salts

The method of choice for the characterization of micronisation (such as grinding, breaking, etc.) and granulation processes is first and foremost laser diffraction. If one ventures into the sub-micrometer range during grinding processes in wet dispersions, acoustic spectrometry becomes a highly viable method, as it is working especially well in the nanometer region and at high concentration while not being subject to the limitations of laser diffraction with regards to particle size and concentration. In conjunction with electro acoustics, the online analysis of both particle size and zeta potential in micro- and nanometer ranges of concentrated dispersions becomes possible. This strategy is also possible for products which do not derive from a grinding method, such as oxides (e.g. alumina oxide, silica oxide) in the form of powders and granules as well as salts. BET-surface area, density and particle size analysis play an important role for these materials as well.

Analytical methods for different grinding products

ANALYSYS METHOD PARAMETER MEASURING INSTRUMENT
Laser diffraction (wet or dry) Particle size of powder Bettersizer S3 Plus
Bettersizer S3
Bettersizer 2600
Bettersizer ST
Image analysis Particle shape BeVision D2
Bettersizer S3 Plus
Acoustic spectrometry Particle size in micrometer and nanometer ranges in concentrated dispersions DT-1202
DT-100
Electro acoustic Zeta potential DT-1202
DT-310
DT-300
DLS – dynamic light scattering

(Photon correlation)

Particle size in nanometer ranges Nanoptic 90
Gas adsorption BET-surface area and pore analysis 3P micro series
3P meso series
3P sync series
3P surface DX
Gas pycnometriy Density 3P densi 100
Tap volumetry Tap density BeDensi T series
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