X. Xing, J. Deng, Jun Chen
Dec 14, 2004
Citations
1
Influential Citations
54
Citations
Journal
Journal of Alloys and Compounds
Abstract
Abstract An acetate derived barium titanate gel was prepared and the phase developments were investigated by an in situ XRD technique at elevated temperatures in air and in O 2 , XPS and Raman spectrum measurements. The thermal conversion behavior of the precursor powder was followed by thermal analysis (DSC and TGA). BaCO 3 could be formed through the organic substances combustion with the appearance of intermediates. It was found that the intermediate phases contained BaTi 2 O 5 , graphite and non-crystal carbon, which could react with BaCO 3 to form BaTiO 3 evolving large heat at 740.3 °C (BaCO 3 + BaTi 2 O 5 + C + O 2 = 2BaTiO 3 + 2CO 2 ). The oxygen atmosphere facilitates the formation reaction of barium titanium.