EQUILIBRIUM TIE-LINE IN PROY-BAO-CUO TERNARY PHASE-DIAGRAM AROUND PERITECTIC TEMPERATURE OF PR1-XCU3O7-DELTA(XBA2)

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 98 0 degrees C in air atmosphere, for which knowledge is necessary to fab ricate composition controlled Pr(1+x)Ba(2-x)Cu(3)O7-delta single cryst als by the solution growth method. Liquidus faces have been investigat ed by dipping MgO single crystal rods into the thermal equilibrium mel t at various temperatures and analyzing the composition of the adherin g melt by ICP, The compositions of Pr1+xBa2-xCu3O7-delta solid solutio n coexisting with various compositions of liquids were obtained by qua ntitative EPMA analysis of quenched melts. Tie-lines were calculated b y applying the lever rule to these experimental data for solid composi tions and liquidus faces. Furthermore, the relationships between solid solubilities and peritectic temperatures of Pr1+xBa2-xCu3O7-delta are reported.