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Modifier of dispersions of ferromagnetics

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The colloidal solutions of ferromagnetics have application for preparation of magnetic fluids and toners for copying apparatus. Synthesis of dispersed ferromagnetics includes the two main stages: a) preparation of primary particles with magnetic properties and b) formation of magnetic dispersion which is the assembly of clusters.

Formation of primary magnetic particles is carried out by codeposition of metal hydroxides from their salt solutions and potassium hydrate. At the initial stage of synthesis the ferromagnetic substances have the monodomain structure. For its preservation the special dopes of electrolytes may be introduce in reaction mixture.

The regulation of clusters size and form is accomplished with the help of surface modifiers of magnetic particles. As modifiers of surface the mordant and direct dyes may be using.

Because of this it is possible to produce the colloidal solution of ferromagnetics dispersed assembly of clusters.

Document Type: Research Article

Publication date: January 1, 2000

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  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

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