Microstructural Characteriztion of Trimanganese Tetra Oxide (Mn3O4) Nanoparticle by Solvothermal Method and Its Dielectric Studies

Mn3O4nanoparticles were prepared by a solvothermal method using Mn (CH3COO)2?4H2O as precursor and Oleic acid as surfactant at synthesis temperature of 160ºC. The particles have been characterized by X-ray Diffraction (XRD) analysis, Fourier Transform Infrared (FTIR) Spectroscopy, Field Emission Scanning Electron Microscopy (FESEM), High Resolution Transmission Electron Microscopy (HRTEM), and Energy Dispersive X-ray (EDX) analysis techniques. The XRD pattern showed that the Mn3O4 microsphere exhibit tetragonal hausmannite structure. Formation of Mn3O4compound was confirmed from FTIR studies. Mn3O4 microsphere prepared at 160ºC resulted in microsphere, nanoflower and flower ?like nano rod structures. The manipulated size and shape were observed for various reaction times. The chemical composition was obtained by EDX analysis and confirmed the presence of Mn and O in the sample. The Selected Area Electron Diffraction (SAED) patterns revealed that the nanocrystals are polycrystalline in nature. Dielectric constant and AC conductivity of the nanomaterial at different temperatures were studied with respect to frequency.