Equilibrium tie-line in PrOy-BaO-CuO ternary phase diagram around peritectic temperature of Pr1+xBa2-xCu3O7-δ

This paper presents tie-lines between Pr1+xBa2-xCu3O7-delta and liquid on a PrOy-BaO-CuO ternary phase diagram at 965, 970, 975, 980, and 980 degrees C in air atmosphere, for which knowledge is necessary to fabricate composition controlled Pr(1+x)Ba(2-x)Cu(3)O7-delta single crystals by the solution growth method. Liquidus faces have been investigated by dipping MgO single crystal rods into the thermal equilibrium melt at various temperatures and analyzing the composition of the adhering melt by ICP, The compositions of Pr1+xBa2-xCu3O7-delta solid solution coexisting with various compositions of liquids were obtained by quantitative EPMA analysis of quenched melts. Tie-lines were calculated by applying the lever rule to these experimental data for solid compositions and liquidus faces. Furthermore, the relationships between solid solubilities and peritectic temperatures of Pr1+xBa2-xCu3O7-delta are reported.