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Derivatographic study of the thermal behaviour of 13 rare earth element oxides

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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.

Zusammenfassung

Mittels eines MOM-Derivatographen wurden in statischer Atmosphäre im Temperaturbereich von Raumtemperatur bis 1050°C die simultanen TG-DTG-DTA thermoanalytischen Kurven von 13 Seltenerdenelementoxiden, namentlich von CeO2, Dy2O3, Er2O3, Gd2O3, HfO2, Ho2O3, Nd2O3, Pr6O11, Sm2O3, Tb4O7, Tm2O3, Yb2O3 und von Y2O3 aufgenommen. Lediglich HfO2, Nd2O3, Pr6O11, Sm2O3 und Tb4O7 zeigten einen nennenswerten Gewichtsverlust, verursacht durch eine geringe Freisetzung von Sauerstoff. Zur Identifizierung der thermischen Zerfallsprodukte und ihrer Vorstufen wurde die Röntgendiffraktometrie herangezogen.

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Authors and Affiliations

  1. Department of Chemistry, College of Science, University of Baghdad, Jadriya, Baghdad, Iraq

    F. Jasim

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  1. F. Jasim
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Jasim, F. Derivatographic study of the thermal behaviour of 13 rare earth element oxides. Journal of Thermal Analysis 42, 1075–1079 (1994). https://doi.org/10.1007/BF02546917

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  • DOI: https://doi.org/10.1007/BF02546917

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