A novel preparation method of the SrFeO3 cubic perovskite by electrochemical means

Preparation and characterization of highly densified YBa2Cu3O7‐δ Ceramics used for electrochemical oxidation

“…This phenomenon is attributed to the high density of the material which prevents oxygen diffusion.In some recent papers we have shown the possibility of oxidizing dense La,CuO, ceramics for preparing a new superconducting material using an electrochemical process (anodic oxidation in alkaline medium) [7, 81. In a similar way stoichiometric SrFeO, has been obtained starting from SrFeO,,,[9]. Analogous increase of oxygen content could be expected for various other oxides, especially for oxygen deficient YBa,Cu,O,_,.…”

Mossbauer Spectroscopic Study of La2-2xSr2xCu1-xFexO4-y(0≤x≤0.5) Solid-solution

“…For instance, SrFe(IV)O 3 and CaFe(IV)O 3 can be prepared under high oxygen pressures 13,14 and by electrochemical oxidation. 15 Iodometric titration can give us a valuable information on the valence state of iron stabilized in the perovskite-related metal oxides. In case that the metal oxides are composed of binary transition metals (Cu and Fe), the valence states of iron can be determined assuming that the valence state of Cu is invariable.…”

New Mixed Valent Ferrites (Tl1.5Hg0.5)Sr3−xBaxFe2O9−δ(0≤x≤2) with the Tl-2212-Type Structure

“…It can be decomposed into two classical Lorentzian doublets (Table 4) whose isomer shifts of 0.23 and 0.10 mm/s respectively correspond to the typical variations which can be expected between 4.2 and 293 K for Fe> and Fe> species. However, it should be noted that at 293 K the [17][18][19]. This has been explained on the basis of charge transfer phenomena which involve either disproportionation of Fe> into Fe> and Fe> or electron transfer of the type Fe>#O\"Fe>#O\.…”