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Phase Relations in the Pyrochlore‐Rich Part of the Bi 2 O 3 −TiO 2 −Nd 2 O 3 System
Author(s) -
Kunej Špela,
Škapin Srečo D.,
Suvorov Danilo
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2009.03207.x
Subject(s) - pyrochlore , solid solution , materials science , phase diagram , phase (matter) , analytical chemistry (journal) , scanning electron microscope , solubility , mineralogy , crystallography , chemistry , metallurgy , organic chemistry , chromatography , composite material
In this study we used solid‐state synthesis to determine the phase relations in the pyrochlore‐rich part of the Bi 2 O 3 −TiO 2 −Nd 2 O 3 system at 1100°C. 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 2 O 3 . We determined the solubility limits for the three solid solutions: (i) the pyrochlore solid solution Bi (1.6–1.08 x ) Nd x Ti 2 O (6.4+0.3 x ) , where 0.25< x <0.96; (ii) the solid solution Bi 4− x Nd x Ti 3 O 12 , where 0< x <2.6; and (iii) the Nd 2− x Bi x Ti 2 O 7 solid solution, where 0< x <0.35. The determined phase relations in the pyrochlore‐rich part are presented in a partial phase diagram of the Bi 2 O 3 −TiO 2 −Nd 2 O 3 system in air at 1100°C.