SIFAT MAGNET BARIUM HEKSAFERIT BaO.6Fe2O3 HASIL SINTESIS DENGAN METODA KIMIA BASAH[Barium Hexaferrite BaO.6Fe2O3 Magnetic Properties Synthesized with a Wet Chemicals Method]

Abstract

Barium heksaferit, BaO.6Fe2O3 has been successfully synthesized by a wet chemical method, namely coprecipitation and micro-emulsion method. Precursor samples were then sintered at 900 °C and 1000 °C for 3 hours in air environment. Observations were conducted with some equipment, such as x-ray diffraction techniques (XRD), transmission electron microscope (TEM), vibrating sample magnetometer (VSM), thermogravimetric and differential thermal analysis (DTA and TGA). The results showed that the intrinsic coercivity of BaO.6Fe2O3 synthesized with co-precipitation method was obtained of about 5.36 kOe, larger than the coercivity of BaO.6Fe2O3 synthesized with micro-emulsion method which is only 3.89 kOe. High magnetic coercivity is closely related to particle size of BaO.6Fe2O3 was very smooth with a low content of impurity phase. This result was supported by TEM observation showing that the particle size of BaO.6Fe2O3 obtained by co-precipitaion gained between 50-200 nm.