Method of determining dispersion, particle density or viscosity

Details Method of determining dispersion, particle density or viscosity Method of determining dispersion, particle density or viscosity

1983-09-21

1987-03-17

Karlsen, Ernest F.

Electricity: measuring and testing

Magnetic

Fluid material examination

324239, G01N 2774, G01R 3312

Patent

active

046510923

ABSTRACT:
For characterizing coating compositions with magnetic particles the coating composition is subjected to an alternating magnetic field of 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 variable frequency, conclusions can be made regarding the degree of dispersion, particle density, and viscosity of the coating composition. The variable frequency is between 1 and 100 cps, and the field intensity of the energizing field should be lower than 10 Oerstedt. The coating composition is fluid or stagnant in a pipe *1, 11 which is surrounded by field coil and measuring coil.

REFERENCES:
patent: 2878444 (1959-03-01), Feher
patent: 3534256 (1970-10-01), Johnson, Jr.
patent: 3586963 (1971-06-01), Arrott et al.
patent: 4523146 (1985-06-01), Champaigne
Tso, "Toner Concentration Meter", Xerox Disclosure Journal, vol. 5, No. 3, May/Jun. 1980, pp. 315-316.

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