Pengaruh Perlakuan Panas terhadap Sifat Magnetik, Permitivitas dan Permukaan Komposit Ba(2-x)La(x)Fe2O5 ( x = 0,3 dan 0,5 )

Abstract

Composite  of Ba_(2-x)La_(x)Fe₂O₅ has been made by powder metallurgy techniques. Ba_(2-x)La_(x)Fe₂O₅ were made with mixing of  BaCO₃, La₂O₃ and Fe₂O₃ with a specific weight ratio. The materials composite tobe made with the technique of powder metallurgy with milling method for 2  hours and heat treatment at  800 °C, 900 °C and 1000 °C for 5 hours. After the heat treatment tobe done characterization with using  Scanning Electron Microcope ( SEM ) to observe the surface morphology and magnetic properties with Vibrating Sample Magnetometer (VSM) to study the magnetic properties. The composite of Ba_(2-x)La_(x)Fe₂O₅ show that the magnetic moment and the magnetic field strength decrease with increasing temperature sintering. Permittivity of Ba_(2-x)La_(x)Fe₂O₅  relatif stable af frequence 1 Hz to 100 kHz. The results of surface morphology is known that the morphology of the granulars of composite Ba_(2-x)La_(x)Fe₂O₅, regular  grains with increasing temperature of sintering, the spectrum EDS (Energy Dispersive Spectroscopy) showed some dominant element  indicate that is have same phase of analysis and formation composite magnetic. The composite of Ba_(2-x)La_(x)Fe₂O₅ show that the magnetic moment and the magnetic field strength decrease with increasing temperature sintering

Keywords: Composite Ba_(2-x)La_(x)Fe₂O₅, magnetic, pearmitivity, surface.