PRECURSOR ROUTE FOR THE SYNTHESIS AND CHARACTERIZATION OF CALCIUM NANOFERRITES OBTAINED THROUGH THERMAL DECOMPOSITION OF HEXAPROPIONATOFERRATE (III) PRECURSOR MOIETY

Abstract

Synthesis of calcium ferrite (CaFe2O5 nanoparticles), the thermolysis process for calcium
propionato precursor moiety, has been embraced in streaming air condition at the rate of 5 C
min-1
. Different powerful techniques such as Fourier Transform Infrared Spectroscopy (FTIR),
simultaneous thermal Analysis (TG-DTG-DTA) combined with M?ssbauer spectroscopies, X-ray
powder diffraction (XRD), Transmission Electron Microscopy (TEM) have been utilized for
characterizing the obtained intermediates and final product after decomposition. During
progress of thermal analysis, precursor undergoes decomposition in calcium oxalate (CaC2O4)
& ferric oxide (?-Fe2O3) at 320 C after dehydration process at 135 C. Obtained mixture
further undergoes decomposition to form calcium carbonate (CaCO3) and gaseous products at
750 C. Above 750 C, ?-Fe2O3 and calcium carbonate fused together to form calcium ferrite
(CaFe2O5). The identity of the obtained intermediate and products have been identified after
calcining the precursor isothermally in nickel crucible. Temperature employed for the forming of
calcium ferrite, CaFe2O5, during the precursor technique is low as mapped to normal solid state
methods.