Mechanosynthesis of La1-xSrxMnO3 (x = 0, 0.25, 0.5, 0.75 and 1) was carried out at room temperature from stoichiometric mixtures of La2O3, Mn2O3 and SrO, obtaining monophasic powders with the perovskite structure. Physical properties of these materials and their chemical compatibility with the electrolyte yttria stabilized zirconia (YSZ), which depend strongly on the La/Sr ratio, were evaluated...

This study shows that in an atmosphere containing water vapor, the oxide layer on surface of 9CrNB steel MarBN (Martensitic 9Cr strengthened by Boron and MX Nitrides) was formed outer hematite Fe2O3 Cr2O3 inner two-phase Fe3O4 + (Fe, Cr)2O4, which confirmed XRD analysis. Part consisted nodules pores were during increase oxides when present H2O(g) acted surface. The diffusion mechanism at temper...

A complete package [ensemble, complex] of physical and chemical investigations was conducted: x-ray phase analysis, differential thermal analysis waste generated in the production vanadium. It established that these wastes, which contain 17.39% Mn2O3 their composition, are a promising raw material for wall ceramics with volumetric-staiing. The effect heat treatment at 200, 500, 600, 700°C on co...

Using a combination of high-angle annular dark-field scanning transmission electron microscopy and atomically resolved electron energy-loss spectroscopy in an aberration-corrected transmission electron microscope we demonstrate the possibility of 2D atom by atom valence mapping in the mixed valence compound Mn3O4. The Mn L(2,3) energy-loss near-edge structures from Mn2+ and Mn3+ cation sites ar...