THE PREPARATION OF PBTIO3 USING THE OXALATE COPRECIPITATION METHOD

A general method is described for the preparation of an oxalate precur sor for the synthesis of PbTiO3. The total concentrations are given fr om which a precursor with the correct 1:1 ratio for Pb:Ti is obtained. The thermal behavior of the oxalate precursor in different atmosphere s is investigated employing DSC and TGA coupled with FTIR, IR and XRD. Two main differences are found when the precursor is heated in N2 ins tead of O2. Firstly the amount of CO or CO2 released around 500-600-de grees-C is much greater in a N2 atmosphere, secondly besides PbTiO3 al so Pb and PbTi3O7 are formed when heated in N2.