Arrangement for characterizing magnetic particle dispersions

Details Arrangement for characterizing magnetic particle dispersions Arrangement for characterizing magnetic particle dispersions

G - Physics

01

N

324/55

G01N 27/76 (2006.01) G01N 27/74 (2006.01) G01R 33/16 (2006.01)

Patent

CA 1231379

ABSTRACT ARRANGEMENT FOR DETERMINING CHARACTERISTICS OF MAGNETIC PARTICLE DISPERSIONS For determining characteristics of coating compositions including magnetic particles, the coating composition is subjected to an alternating magnetic field of selectively variable frequency. The field induced by the coating composition after energization is recorded, and thus the susceptibility of the coating composition is measured. Depending on the selected frequencies, conclusions can be made regarding the degree of dispersion, particle density, and viscosity of the coating composition. The frequency is varied between 1 and 100 cups, and the field intensity of the energizing field should be lower than about 10 Oersted. The coating composition may be static or flowing in a container pipe or conduit which is surrounded by field coils and a measuring coil.

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