Effect of Na2co3 composition on the properties physical, magnetic and crystal structures in Ba-ferrite magnet

Research was to determine the effect of the composition addictive material on physical properties, magnetic properties and crystal structure of Ba-ferrite magnets using additives Na2CO3. The composition of the addictive ingredients used is 0%, 0.5%, 1%, and 1.5% with mass of 30 grams. Sample preparation was used metallurgy method and mixing using a ball mill for 3 hours, then proceed with the drying process using the oven and proceed with pellet printing process with the addition of 5% PVA adhesive. Printing process performed using a hydraulic press machine with a force of 8 tonf held for 1 minute. Furthermore, the sintering process using a vacuum furnace at 1000 C˚ with a holding time of 1 hour. The characterization result of the density measurement increases the density and magnetic flux highest was 205.4 gauss of 1.5% addictive. VSM obtained remanence, coercivity, and one constellation of each value is Mr = 1.2463 kG, Hc = 1.1191 kOe and Ms = 3.1202 kG in the sample with a composition of 1% additive. Result XRD analysis shows 3 phases, namely BaFe12O19, Na2O and Fe3O4 phases. The calculation results. The size of the crystals is obtained by a small size difference ratio, then the additive is not affect crystal size.