p-ISSN 2089 – 0133 e-ISSN 2477-6416 Indonesian Journal of Applied Physics (IJAP) Vol. 13 No.2 page 207 URL : https://jurnal.uns.ac.id/ijap/article/view/70436 DOI : https://doi.org/10.13057/ijap.v13i2.70436 Copyright © 2023 Universitas Sebelas Maret EFFECT OF THE COMPOSITION OF TiO 2 ADDITIVES ON THE PHYSICAL AND MAGNETIC PROPERTIES, CRYSTAL STRUCTURE AND MICROSTRUCTURE OF BaFe 12 O 19 MAGNETIC CERAMICS Ramlan, Endah Puspita* Physics department, Faculty of Mathematics and Natural Sciences, University of Sriwijaya, Palembang, Indonesia * endahpuspita1908@gmail.com Received 15-01-2023, Revised 17-02-2023, Accepted 15-07-2023 Available Online 15-07-2023, Published Regularly October 2023 ABSTRACT A BaFe12O19 sample was prepared with variations in the addition of TiO2 additives of 0%, 0.3%, 0.6% and 0.9% using the powder metallurgy method. The characterization carried out was density and porosity, X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Vibrating Sample Magnetometer (VSM), and magnetic flux strength test. Based on the results of density and porosity, it shows that the BaFe12O19 sample with a variation of TiO2 additive of 0%, 0.3%, 0.6%, and 0.9% has a density of 4.41 g/cm 3 , 4.73 g/cm 3 , 4.95 g/cm 3 , and 4.72 g/cm 3 , while the porosity was 5.45 g/cm 3 , 3.79 g/cm 3 , 2.15 g/cm 3 , and 4.68 g/cm 3 , respectively. From the XRD results, it shows that samples using additives and without TiO2 additives produce BaFe12O19 phases, but there are still impurity phases that appear such as Fe2O3 (0% TiO2), Ti6O11 (0.3% and 0.9% TiO2), and Ti4O7 (0.6 % TiO2). From the SEM results, the morphology of the BaFe12O19 sample at 0.6% TiO2 produced quite large grain particles, namely 0.5 – 1.5 μm. In VSM and magnetic flux, it shows that the BaFe12O19 sample is the highest hard magnetic at 0,6% variation with Ms, Mr, Hc respectively of 50.40 emu/gr, 23.20 emu/gr, 1.758 kOe and flux strength magnetic field of 272.65 Gauss. Keywords: BaFe12O19; TiO2; additives Cite this as: Puspita, E., & Ramlan. 2023. Effect of The Composition of TiO2 Additives on The Physical and Magnetic Properties, Crystal Structure and Microstructure of BaFe 12O19 Magnetic Ceramics. IJAP: Indonesian Journal of Applied Physics, 13(2), 207-214. doi: https://doi.org/10.13057/ijap.v13i2.70436 INTRODUCTION Barium Hexaferitte is a mixture of oxide compounds such as BaO and Fe2O3 which form the formula BaFe12O19 [1-2] . BaFe12O19 is often used in the manufacture of harvesting magnets [3] . This is because BaFe12O19 has the advantages of cheap raw material costs, high electrical resistivity of 108 Ω cm, high Curie temperature of 725 o C, very stable and good corrosion resistance, and large magnetocrystalline anisotropy [4-5] . Permanent magnets are magnets that have permanent magnetic properties and are not easily lost [6] . Permanent magnets are widely used in various applications such as the electrical machinery and instrument industry, for example electric motors, electromagnetic transducers, and analog measuring devices with magnetic circuits [7–10] . The technique for making BaFe12O19 can be done physically and chemically. Physical techniques can be in the form of solid reaction methods [11] , while chemical techniques can be in the form of sol-gel methods [12] . The magnetic properties,