Author: F. Jasim 1
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  • 1 University of Baghdad Department of Chemistry, College of Science Jadriya Baghdad Iraq
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Abstract  

The simultaneous TG-DTG-DTA thermoanalytical curves of 13 rare earth (4f) element oxides, namely, CeO2, Dy2O3, Er2O3, Gd2O3, HfO2, Ho2O3, Nd2O3, Pr6O11, Sm2O3, Tb4O7, Tm2O3, Yb2O3 and Y2O3, were recorded with a MOM derivatograph under static air atmosphere over the temperature range from ambient to 1050°C. Only HfO2, Nd2O3, Pr6O11, Sm2O3 and Tb4O7 showed appreciable weight losses due to the liberation of small amounts of oxygen. X-ray diffractometry was used to identify the thermal degradation products and their precursors.