Synthesis of Nano-Ca doped Ceria by combustion method and investigating of effective factors on process

Abstract

A Synthesis of doped ceria by combustion method is performed. Two types of fuel such as<br />urea and glycine is used to investigate the effect of fuel reactivity and reaction rate on the<br />morphology of the resulted powders. Thermo gravimetric analysis is carried out by (TG/DTA,<br />Rigaku Thermalplus TG 8120) to study the exo–endo temperature of as-received powder. The<br />crystalline phases are identified by X-ray diffraction analysis (XRD). The average crystallite<br />size, D, is estimated by using the Scherrer formula about 40nm. The calculated lattice parameter<br />is 5.44Å. A FT-IR study is carried out on the obtained gel and reveals that a Glycine-Metal<br />complex is formed in alkaline conditions which help in preventing metal ions selective<br />precipitation and in maintaining the compositional homogeneity of the resulted powder.<br />Finally, the effect of pH value, in the primary solution, and fuel type on the powder<br />characteristics such as lattice parameter and morphologies are described.