Synthesis, Characterization and Electrical Conductivity of Nano-Crystalline Erbium Sesquioxide by the Precipitation Method and Subsequent Calcination

摘要

Due to its superior properties, erbium sesquioxide, Er2O3, is considered as an important material forapplications in various fields such as corrosion-resistant coating, electrical insulating coating, insensing membranes, semiconductor devices, as catalyst, and for applications in nuclear engineering. Inthe open literature there is a lack of information about the preparation of Er2O3 nanoparticles using thehomogenous precipitation and subsequent calcination route. In this paper a facile method for thesynthesis of Er2O3 nanoparticles is suggested. The fabrication was carried out by using thehomogeneous precipitation of an erbium ions using sodium hydroxide followed by the calcinationprocess. The influence of: (i) the pH value (9-12) during precipitation process, and (ii) the calcinationtemperature 300-700 C on the structural and textural properties of the solids obtained will beaddressed. The thermal events accompanying the heat treatment of the dried parent was monitoredusing thermogravimetric analysis (TGA). Various physicochemical techniques were used forinvestigating the structure and morphology of Er2O3 nanoparticles. These include X-ray diffraction(XRD), Fourier transform infrared (FTIR) spectra, filed emission scanning electron microscopy (FE- SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS).Moreover, the electrical conductivity of the calcined samples with temperature was measured.