Characterization of BaFe12O19/Co3O4 using mechanical alloying approach for microwave absorbing materials

In this research, the BaFe 12 O 19 /Co 3 O 4 material was carried out using the mechanical alloying approach with variations in Co 3 O 4 composition of (10, 15, 20) wt%. The characterizations were using XRD, SEM-EDX, and VNA. The results of XRD analysis show that increasing crystal diameter increases Co 3 O 4 compositions. SEM analysis results show that BaFe 12 O 19 particles tend to form larger with the addition of Co 3 O 4 particles, causing agglomeration. EDX shows that the percentage of Co 3 O 4 increases, and the number of Fe atoms decreases while the number of Co atoms increases, indicating that Co ions replace Fe ions. The results of VNA analysis showed that the addition of 10 % Co 3 O 4 composition had optimum absorption compared to other samples with a reflection loss of −22.7dB at a frequency of 10.88 GHz with an absorption percentage of 99.46 %.