Abstract
The mechanochemical processes, including mechanochemical synthesis of mixed-valence lead oxides, in mixtures of PbO, Pb3O4 , and PbO2were studied by x-ray diffraction. The results demonstrate that the reduction of Pb4+is accompanied by the formation of Pb2O3 , Pb3O4 , and possibly PbO1.37 . Phases of variable composition close in structure to minium, Pb3O4 , are shown to coexist during mechanical processing. The structure of the metastable oxide Pb3O4 – x with Pb2+: Pb4+> 2 (@O4 – 2x ) is tentatively determined. The sequence of the observed transformations is interpreted in terms of the model for the reaction zone, with consideration for primary and secondary interactions.
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Zyryanov, V.V., Gusev, A.A. Mechanochemical Reactions in Mixtures of Lead Oxides. Inorganic Materials 37, 257–263 (2001). https://doi.org/10.1023/A:1004117414763
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DOI: https://doi.org/10.1023/A:1004117414763