Characterization and Dielectric Properties of LaMnO3 Nanofibers

A new approach, combining sol-gel process with electrospinning technique was used to prepare LaMnO3 /PVA composite nanofibers. In this research work, LaMnO3 nanopowders were firstly prepared by calcination of composite carbonate at 1000 °C for 30 min. Electrospinning technique has been extensively explored as a simple and versatile method for drawing nanofibers from polymer solutions. LaMnO3 / PVA perovskite-type nanofibers were obtained after annealed at 500 °C, 600 °C, 700 °C and 800 °C for 2 h respectively. Novel polycrystalline LaMnO3 nanofibers were yielded at different temperatures as the final products. Phase formation and crystal structure of LaMnO3 nanopowders were characterized by X-ray diffraction (XRD). Field Emission Scanning Electron Microscope (FESEM) images revealed that LaMnO3 as-spun nanofibers on Al foils were attracted to be in the range of 60 nm to 120 nm in diameters with electrospinning set-up for 20 min. The modification and functionalize sample surface at a nanometer range of LaMnO3 nanofibers were examined by Atomic Force Microscopy (AFM). The dielectric properties of LaMnO3 nanofibers were identify by C-f, r-f, tan -f and ac-f characteristics. The qualifications of LaMnO3 nanofibers were successfully yielded by the electrospinning technique as final products. The results obtained from this research will lead to enable new levels of electronic applications, biomedical applications and protective clothing as the field of nanotechnology