Synthesis and properties of na nomagnetite for the preparation of biocomposites

Magnetite powder (FeO·Fe2O3 or Fe3O4) is obtained by the chemical precipitation method, using FeCl3·6H2O and FeCl2·4H2O as a starting materials in presence of hydrazine N2H4 at temperature 80 °C. X-ray diffraction analysis, infrared spectroscopy, scanning electron microscopy are used for study phase composition morphology synthesized powder. Its specific surface area magnetic properties such as, particular, saturation magnetization, coercive force residual induction investigated. It established that represented magnetite main with small admixture hematite. shown particles have sizes 33-84 nm tend to agglomeration. The prepared has superparamagnetic (specific magnetization — 35 A · m2/kg, 0.24 kA/m, 0.009 T) promising biocomposite creation.