E.R. Andrievskaya/ Journal of the European Ceramic Sociery 28(2008)2363-2388 T.℃ m%,(b) HfO2-Ln2o3 2c4n23 2400 HOz-Ln2Oa 30 2000 1800 0.0840088009200960.1000.104 960.1000.104 Fig. 5. Dependence of melting temperature(a)and composition(b)for eutectics in the systems MeO2-Ln2O3 vs effective ionic radius of lanthanide(Table 2, RLn3+ and RMe are taken by Ahrens scale " (a) V,nm l(b) 05320 0.1415 05315 b 05210 05160 05155 Yb ErY Sm Nd La 05150 0.09 0.10 Yb ErY Sm Nd La Fig. 6. Dependence of lattice parameters(a)and volume of elementary cell(b)for the solid solution based on monoclinic ZrO2 vs ionic radius of dopant. 230 058:。N axls·c 0.518 0514 0514 0.510 (a) mol RO15 mol RO15 Fig. 7. Dependence of lattice parameters(a)and volume of elementary cell(b)for the solid solution based on tetragonal ZrO2 versus ionic radius of dopant. 179E.R. Andrievskaya / Journal of the European Ceramic Society 28 (2008) 2363–2388 2371 Fig. 5. Dependence of melting temperature (a) and composition (b) for eutectics in the systems MeO2–Ln2O3 vs. effective ionic radius of lanthanide (Table 2, RLn3+ and RMe4+ are taken by Ahrens scale 257). Fig. 6. Dependence of lattice parameters (a) and volume of elementary cell (b) for the solid solution based on monoclinic ZrO2 vs. ionic radius of dopant.230 Fig. 7. Dependence of lattice parameters (a) and volume of elementary cell (b) for the solid solution based on tetragonal ZrO2 versus ionic radius of dopant.179