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Formation of the Perovskite Phase in the PbMg 1/3 Nb 2/3 O 3 ─PbTiO 3 System
Author(s) -
Bouquin Olivier,
Lejeune Martine,
Boilot JeanPierre
Publication year - 1991
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.1151-2916.1991.tb04360.x
Subject(s) - pyrochlore , perovskite (structure) , calcination , materials science , phase (matter) , oxide , mineralogy , lattice (music) , reactivity (psychology) , crystallography , analytical chemistry (journal) , chemistry , metallurgy , catalysis , physics , medicine , alternative medicine , organic chemistry , pathology , biochemistry , chromatography , acoustics
The reaction sequences during calcination of oxide mixtures were studied for the PbMg 1/3 Nb 2/3 O 3 ─PbTiO 3 (PMN‐PT) system. The effect of reactivity and composition of the starting mixtures was investigated. In the present study, a B‐site‐deficient, cubic pyrochlore phase in the PbO‐Nb 2 O 5 system was formed at 500°C. The perovskite phase of PMN was formed at 7007deg;C through the diffusion of MgO into the pyrochlore phase. The lattice parameter of the pyrochlore phase decreased as this transformation to perovskite progressed.