Electronic edition ISSN 1574-0579

Magnetic properties of finely dispersed ferrosuspensions synthesized by the electrical condensation method

E. N. Mozgovoi - E. Ya. Blum

Institute of Physics, Latvian Academy of Sciences, Salaspils-1, LV-2169, Latvia

Abstract
Results of an investigation of the magnetic properties of finely dispersed iron suspensions in toluene are presented. The dispersion of the iron was carried out using the electrical condensation method. The average diameter of the iron particles varied from 1.5 to 3.5 μm, depending on the operating conditions of the generator. The use of aluminum naphthenate as a suspension stabilizer makes it possible to ensure adequate stability of the system for an iron content by weight of from 0 to 3 0x0p+0nd a magnetiz ing field H = 6·10⁵ A/m. The dependence of the magnetic susceptibility of the system on the degree of dispersion of the particles is shown on the basis of the superparamagnetic theory. For H = 3.35·10⁵ A/m and a 2.5 0ron content, the magnetization of the system attains a value of 4·10² A/m.