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Thermal transformations of selected transition metals oxyhydroxides

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Abstract

The results of investigation of thermal dehydroxylation of freshly precipitated iron(III) oxyhydroxide, α-FeO·OH (goethite) and titanium(IV) oxyhydroxide, TiO(OH)2 are reported. The measurements have been carried out by thermogravimetric method in static air atmosphere at different heating rates. The crystal structure of intermediate products has been identified by X-ray powder diffractometry. The JMAEK model A3 has been used as the adequate equation representing the dehydroxylation process of precipitated goethite. The third order model F3 has been used for description the rate of dehydroxylation reaction of titanium(IV) oxyhydroxide. The products of thermal dehydroxylation of mentioned oxyhydroxides can be used as precursors for preparation of ferrites or titanates.

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Authors and Affiliations

  1. Institute of Chemistry and Environmental Protection, Technical University of Szczecin, 71-065, Szczecin, Al. Piastów 42, Poland

    Krystyna Przepiera & A. Przepiera

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  1. Krystyna Przepiera
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  2. A. Przepiera
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Przepiera, K., Przepiera, A. Thermal transformations of selected transition metals oxyhydroxides. Journal of Thermal Analysis and Calorimetry 74, 659–666 (2003). https://doi.org/10.1023/B:JTAN.0000005208.61392.24

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  • DOI: https://doi.org/10.1023/B:JTAN.0000005208.61392.24

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