Synthesis of crystalline YCoO3 perovskite via sol–gel method

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

“…According to Xray diffraction it was found that after 120 h annealing at 1173 K in air YCoO 3−δ possesses orthorhombically distorted perovskite structure (sp.gr. Pbnm) [13][14][15][16][17][18]. The unit cell parameters presented by Jadhao et al a ¼5.132 Å, b ¼5.417 Å, с ¼7.367 Å [16], were in good agreement with the data reported in [12,14,15].…”

“…According to the results of XRD the sample with x¼ 0 consisted of Y 2 O 3 and CoO as expected since YCoO 3−δ is usually prepared and investigated at temperatures that do not exceed 1173 K [13][14][15][16][17]. On the other side the sample with x¼1 was single phase BaCoO 3−δ crystallized in hexagonal structure with the unit cell parameters а¼5.665 Å, c¼28.493 Å (sp.…”

“…It was prepared by standard ceramic technique under high (50-70 kbar) oxygen pressure [12], or at 1173 K during 100 h in the oxygen flow [13][14][15], or by the decomposition of yttrium and cobalt cyanides [16], or by sol-gel method [17,18]. According to Xray diffraction it was found that after 120 h annealing at 1173 K in air YCoO 3−δ possesses orthorhombically distorted perovskite structure (sp.gr.…”

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.…”

Synthesis and crystal structure determination of YCo1−x Fe x O3 (x = 0, 0.33, 0.5, 0.67 and 1) perovskites

“…[21][22][23] Another method used for the preparation of YCoO 3 is the sol-gel method. 25 Unlike YCoO 3 , it is very hard to obtain YFeO 3 by conventional solid-state methods of synthesis. Namely, the study of the phase diagram of Y 2 O 3 -Fe 2 O 3 system showed that the formation of compound with garnet structure, Y 3 Fe 5 O 12 (Y-Fe garnet) is more favourable.…”