Phase Relations in the Pyrochlore-Rich Part of the Bi_2O_3-TiO_2-Nd_2O_3 System

摘要

In this study we used solid-state synthesis to determine the phase relations in the pyrochlore-rich part of the Bi_2O_3-TiO_2-Nd_2O_3 system at 1100℃. The samples were analyzed using X-ray powder diffraction and scanning electron microscopy with energy- and wavelength-dispersive spectroscopy. A single-phase pyrochlore ceramic was obtained with the addition of 4.5 mol% of Nd_2O_3. We determined the solubility limits for the three solid solutions: (i) the pyrochlore solid solution Bi_(1.6-1.08x)Nd_x Ti_2O_(6.4+0.3x), where 0.25