PREPARATION ON THE MAGNETIC COBALT PARTICLES BY OLEYLAMINE SURFACTANT-ASSISTED HIGH-ENERGY BALL MILLING

Abstract

Cobalt magnetic metal particles with different sizes and morphology have potential applications in many fields of electronics, catalysis, biomedicine,… The synthesis and preparation of these particles with controllable size, micro structure and composition has been considered by many research groups on the world. In this paper, we report preliminary results on the effect of Oleyamine and milling time on the morphology, structure and magnetic properties of Cobalt metal particles prepared by high energy ball milling. SEM images show the coexistence of sub-micrometer particles with flattened-plate shape and nanoparticles with a smaller size of about 30 nm. The magnetization curves indicate that the magnetic properties are less varied by milling time. The influence of milling parameters on the ability to produce fluid from the micro and nano particles is also analyzed and dicussed. Heat generation of these Cobalt nanoparticles in AC magnetic field can be used for magnetic fluid hyperthermia.