Abstract
As a result of titanium and zirconium alcoholates hydrolysis in the presence of dissolved Fe(acac)3, amorphous iron-containing gels have been synthesized. Their heat treatment has led to polycrystalline double oxides Fe x Zr1−0.75x O2−δ (C) and Fe x Ti1−0.75x O2−δ (T) formation. It has been shown that oxides (C) and (T) are likely to be solid solutions with 0.01<x<0.17 and 0.01<x<0.14, respectively. On the basis of X-ray diffraction and extended X-ray absorption fine structure data, iron-zirconium and iron-titanium crystallite models for gels and oxides have been proposed. It has been found that the crystallization process does not lead to a significant change in interatomic distances typical for local structures detected in gels.
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Tsodikov, M.V., Bukhtenko, O.V., Ellert, O.G. et al. Low-temperature formation mechanism of double oxides Fe x Zr(Ti)1−0.75x O2−δ prepared from alkoxides and acetylacetonates. J Mater Sci 30, 1087–1094 (1995). https://doi.org/10.1007/BF01178450
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DOI: https://doi.org/10.1007/BF01178450