Subsolidus phase relations of the SrO–Er2O3–CuO system

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

“…Both the a-and b-axes parameters decrease upon doping, whereas the c-axis parameter (defined along the Cu-O and spin-ladder chains) increases slightly. This behaviour is similar to the case of doping with other rare earths elements [4,[9][10][11]. From these data and the XRD patterns, the solubility limit of Tb in Sr 14−x Tb x Cu 24 O 41 is estimated as 5.5 < x < 6.0.…”

“…For the smallest rare earths (Er, Tm, Yb and Lu) [3][4][5][6], the only ternary phase is the Sr 14−x RE x Cu 24 O 41 solid solution, where the RE solubility limit increases with ion size. For RE = Ho and Dy, an additional ternary phase with SrRE 2 CuO 5 stoichiometry is stable [7,8].…”

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

“…The structure of this ternary section is similar to that of the SrO-RE 2 O 3 -CuO systems where RE = Sc, Y, Lu, Yb, Tm and Er. [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+ .…”

Subsolidus phase relations of the SrO–RE2O3–CuO systems (RE=Tm, Lu and Sc)

“…x max (Er) = 4.2 [11], x max (Tm) = 0 [12] and x max (Yb) = 1 [13]. However, Wong-Ng et al [9] indicate that some Tm can substitute for Sr.…”

“…The published phase diagrams are those involving Y 2 O 3 [1][2][3], La 2 O 3 [4], Nd 2 O 3 [5], Sm 2 O 3 [6], Eu 2 O 3 [7], Gd 2 O 3 [8], Dy 2 O 3 [9], Ho 2 O 3 [10], Er 2 O 3 [11], Tm 2 O 3 [12] and Yb 2 O 3 [13]. These systems were usually investigated in air at 900 • C-950 • C, where the full section is in the solid state.…”