Subsolidus phase relations of the SrO–REOx–CuO systems (RE=Ce, Pr and Tb)

Subsolidus phase relations of the SrO–Ta2O5–CuO system at 900°C in air

“…Out of the binary oxide phases containing Ta that were formed in the present study, all except for the SrTa 4 O 11 phase have Nb analogs with related structure that are stable at 900 • C in air [16,64]. Complete solid Ta-Nd solid solutions were reported for Sr 5 Ta 4−x Nb x O 15 [66], Sr 2 Ta 2−x Nb x O 7 [67] and Sr 6 Ta 2−x Nb x O 11 [68].…”

“…As a part of this effort, the subsolidus phase equilibria of several SrO-MO x -CuO pseudo-ternary systems have been investigated. However, most of these studies are restricted to systems where M is a rare-earth element [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Besides few exceptions (M = V [17], Nb [18,19], Fe [20], Ti, Zr and Hf [21]), the systems involving transition metal elements have not been studied in detail.…”

Subsolidus Phase Relations of the SrO-In2O3-CuO System in Air

“…[33][34][35][36][37] A general trend of the SrO-Ln 2 O 3 -CuO (Ln = lanthanide) is that the solubility of the lanthanide element in the Sr 14 Cu 24 O 41 phase decreases as the Ln 3+ ion radius decreases. [38] The radius of the In 3+ ion is smaller than that of Lu 3+ . [39] It is therefore not surprising that no In solid solubility is observed in Sr 14 Cu 24 O 41 .…”

Preparation and stability of a new compound SrCe0.9Lu0.1O2.95

“…Doped alkaline earth cerates and zirconates exhibit proton conductivity at elevated temperatures due to the water vapor dissolution and mobile protons formation. The cerate-based materials, such as BaCeO 3 and SrCeO 3 , have been studied for a number of years as promising proton-conducting (HTPC) materials [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Perovskites based on SrCeO 3 , doped with Yb or Y, offer more moderate levels of proton conductivity in comparison to Ba-containing analogues but with much lower oxygen ion conductivity, particularly, at high temperatures.…”