THE EFFECT OF BACO3 COMPOUND CHANGES ON THE FORMATION OF MAGNETIC MATERIAL BAFE12O19
ABSTRACT: BaFe12O19 is a
permanent magnetic material which has superior properties to be excellent until
the late of twentieth century. Some of the obstacles in the synthesis of the
material using a stoichiometric composition is a difficulty to obtain a single
phase and the second phase is always found. This research attempted to make
modifications on the initial non-stoichiometric composition by varying the
fraction of Ba/Fe through BaCO3 and Fe2O3 compound through solid state reaction
mechanism. This solid state reaction was initiated by mixing various fractions
of BaCO3 and Fe2O3 powder composition and compacted to produce a homogeneous
mixture using a planetary milling. After drying and molding, it was obtained a
homogeneous mixture like a cylinder with a diameter of 2:54 cm and a thickness
of 0.5 cm. The BaFe12O19 phase was obtained by heating the sample at a
temperature of 1200 ° C for 4 hours. To determine changes in the fraction of
Ba/Fe before and after sintering, the samples were tested by X-Ray Fluorescence
(XRF), while the structure and crystallinity were tested by X-ray diffraction
(XRD) and Scanning Electron Microscope (SEM). The results showed that during the
heating process, the reduction of barium fractions exceeded 5% from of their
initial weight, while changes in the fraction of Fe was not significant. The
results of structure and crystallinity measurement showed that the addition a
substantial amount of barium carbonate can lead to the decrease of
crystallinity from 35.271 nm to 11.265 nm.
Kode Jurnal: jpmatematikadd150793
