Role of CA-EDTA on the synthesizing process of cerate-zirconate ceramics electrolyte

The role of a combination between citric acid (ca) and ethylenediaminetetra acetic acid (edta) as chelating agents in preparation of bacerpowder by a modified sol-gel method is reported. the precursor solutions were prepared from metal nitrate salts (m +),chelating agents (c),and ethylene glycol (eg) at molar ratio of m +: c: eg = 3: 2: 3. chemical and phase transformation of samples during thermal decomposition were analyzed by thermogravimetric analysis (tga) and fourier transform infrared (ftir) spectroscopy. tga results show that the sample prepared by a combination of ca-edta exhibited the lowest thermal decomposition temperature,t td since there was no significant weight loss after 750°c. after calcined at 1100°c,the carbonates residue remained in the samples as proven by ftir results. it was found that the used combination of ca-edta acts as a better combustion reagent to increase the reaction rate and influence the thermal decomposition behaviour compared to a single citric acid and edta,respectively. apparently,calcination temperatures above 1100°c are needed to produce a pure perovskitic bacer © 2013 nur athirah abdullah et al.