Thermoanalytical study of the decomposition of yttrium trifluoroacetate thin films

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• 作者：H. Eloussifi ; J. Farjas ; P. Roura ; S. Ricart ; T. Puig ; X. Obradors ; M. Dammak
• 关键词：Yttrium trifluoroacetate ; Yttria ; Thin films ; Thermal decomposition ; Pyrolysis ; Thermal analysis ; Thermogravimetry
• 刊名：Thin Solid Films
• 出版年：2013
• 出版时间：31 October, 2013
• 年：2013
• 卷：545
• 期：Complete
• 页码：200-204
• 全文大小：773 K

文摘

We present the use of the thermal analysis techniques to study yttrium trifluoroacetate thin films decomposition. In situ analysis was done by means of thermogravimetry, differential thermal analysis, and evolved gas analysis. Solid residues at different stages and the final product have been characterized by X-ray diffraction and scanning electron microscopy. The thermal decomposition of yttrium trifluoroacetate thin films results in the formation of yttria and presents the same succession of intermediates than powder's decomposition, however, yttria and all intermediates but YF₃ appear at significantly lower temperatures. We also observe a dependence on the water partial pressure that was not observed in the decomposition of yttrium trifluoroacetate powders. Finally, a dependence on the substrate chemical composition is discerned.