Abstract
Recently, the ultrafine magnetic particles are applied in many fields, such as magnetic record materials, magnetic fluid, catalysts, biologic medicine materials and so on. In order to fabricate the magnetite nanoparticle with uniform size, liquid phase precipitation method with lower cost is used in this research work. Here, Iron (II) Chloride Tetrahydrate [FeCl2·4H2O], Iron(III) Chloride Hexahydrate [FeCl3·6H2O] mixture solution and NaOH solution were added into the reaction solution by titration method step by step according to the change of pH value, and the solution was being stirred during the reaction process. In this paper, the optimum fabrication condition and the magnetism of composed nanoparticles are investigated. Through evaluation of magnetic property of the fabricated nanoparticle, at room temperature and pH value 7.0, 8nm uniform magnetic particles were synthesized with saturation magnetization value of 48 emu/g and Curie point 471°C.
