Mikhail V. Patrakeev

TL;DR: In this article, the conductivity of the entire solid solution La1−xSrxFeO3−δ, where x=0.5, in the oxygen partial pressure range 10−19−0.9, and temperatures between 750°C and 950°C was reported.

TL;DR: The total electrical conductivity of strontium ferrites, including intergrowth Sr4Fe6O13+δ, Sr3Fe2O6 +δ with a Ruddlesden-Popper structure, and SrFeO2.5 + δ where the cubic perovskite lattice transforms into vacancy-ordered brownmillerite at p(O2)

TL;DR: The linear thermal expansion coefficients (TECs) of perovskite-type La 0.3 Sr 0.7 Fe(Ga)O 3− δ ceramics are determined by dilatometric and high-temperature X-ray diffraction techniques, and the TEC values are in the range (19 −41)×10 −6 K −1 at 770 −1170 K, decreasing when the oxygen partial pressure or gallium concentration increases.

TL;DR: In this paper, the equilibrium chemical strains induced by the oxygen hyperstoichiometry variations in mixed-conducting La2Ni1-xMxO4+δ (M = Fe, Co, Cu; x = 0−0.2) with K2NiF4-type structure, were studied by controlled-atmosphere dilatometry at 923−1223 K in the oxygen partial pressure range 5 × 10-4 to 0.7 atm.

TL;DR: The spinel structure of lithium titanate Li4Ti5O12 is refined by the Rietveld full-profile analysis with the use of x-ray and neutron powder diffraction data as mentioned in this paper.