Phase equilibria, crystal structure and oxygen content of intermediate phases in the Y–Ba–Co–O system

Phase equilibria, structure, oxygen nonstoichiometry, and thermal expansion of oxides in the 1/2Y2O3–SrO–1/2Fe2O3 system

“…The average oxidation state of Fe and the room‐temperature oxygen content values in Sr 1− x Y x FeO 3−δ (0.05 ≤ x ≤ 0.2) and Sr 3− z Y z Fe 2 O 7−δ (0 ≤ z ≤ 0.25) slowly cooled from 1373 K to room temperature (a cooling rate of 1 K/min) were determined by the iodometric titration method described in detail elsewhere . The accuracy of oxygen content in the iodometric titration was estimated as ±0.04.…”

Tuning oxygen content and distribution by substitution at Co site in 112 YBaCo2O5+δ: impact on transport and thermal expansion properties

“…The average oxidation state of Co and room-temperature oxygen content values in YBaCo 2x Me x O 5+d (Me ¼ Cu, Ni) were determined by iodometric titration. 24 The samples, with weights of 0.1-0.2 g, were dissolved in HCl in the presence of KI, and then the obtained solution was titrated with a thiosulfate solution. The concentration of Na 2 S 2 O 3 was preliminarily determined by a chromatometric titration using an exact amount of K 2 Cr 2 O 7 .…”

Study and optimization of the synthesis routine of the single phase YBaCo2O6-δ double perovskite

“…Taking into account that synthesis of YBaCo 2 O 6-δ proceeds through the formation of intermediate phases of YCoO 3-δ and BaCoO 3-δ like other double perovs-kites LnBaCo 2 O 6-δ [14] as well as that a synthesis routine for these intermediate phases has been already described in literature [15,16] 3 were preliminary calcined at 1100 °C and 600 °C, respectively, in air for two hours in order to remove adsorbed H 2 O and CO 2 . Stoichiometric mixture of starting materials was dissolved in concentrated nitric acid.…”