Synthesis of MnFe2O4 Nanoparticles as a Basic Material for Microwave Absorber

This work aimed to synthesize MnFe2O4 nanoparticles using the coprecipitation method. Manganese chloride dihydrate (MnCl2.4H2O) and iron sand from South Cianjur, Indonesia, were used as a precursor for nanoparticle synthesis. The elements compounds tested X-Ray Fluorescence (XRF). was characterized Diffraction (XRD), Scanning Electron Microscope-Energy Dispersive (SEM-EDX), Vector Network Analyzer (VNA). test result showed that 70.54% of Cianjur contained sand. SEM have an average size 73.75 nm with round shape, which attributed agglomeration process. EDX synthesized only Mn, Fe, O without contaminants. XRD crystal phase formed less than 27 nm. largest reflection losses in 11.5 - 12.5 GHz range found 1:2 variation, i.e., 35.08 dB. study adding increases microwave absorption.