Formation,dissociation and expansion behavior of platinum group metal oxides (PdO,RuO2, IrO2) |
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| Authors: | G Bayer HG Wiedemann |
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| Institution: | Institute for Crystallography and Petrography, Swiss Federal Institute of Technology, Zürich Switzerland;Mattler Instrumente AG, Greifensee/Zürich Switzerland |
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| Abstract: | The oxidation behavior of palladium, ruthenium and iridium powders of different grain sizes was investigated by TG, DTA and X-ray methods. The solid oxides formed during heating up (PdO, RuO2, IrO2) show different stability and decomposition temperatures depending on the oxygen pressure. The kinetics of the reaction MeOx → Me+x/2 O2 is discussed. High temperature X-ray studies confirmed the strong anisotropy of thermal expansion in the case of RuO2 and IrO2. The thermal expansion behavior of these oxides is compared to that of other rutile-type oxides. |
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