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Microstructure of Lead‐Magnesium Niobate Ceramics
Author(s) -
Goo E.,
Yamamoto T.,
Okazaki K.
Publication year - 1986
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.1151-2916.1986.tb04835.x
Subject(s) - pyrochlore , materials science , microstructure , ceramic , transmission electron microscopy , magnesium , amorphous solid , phase (matter) , mineralogy , perovskite (structure) , analytical chemistry (journal) , chemical engineering , metallurgy , crystallography , nanotechnology , chemistry , organic chemistry , chromatography , engineering
Lead‐magnesium niobate ceramics were processed with excess MgO and by precalcining MgO and Nb 2 O 5 . Transmission electron microscopy revealed sub‐micrometer MgO inclusions in the perovskite phase. The pyrochlore phase exists as submicrometer rectangular crystals in an amorphous PbO matrix. The composition of the pyrochlore phase was calculated to be Pb 2.25 Mg 0.27 Nb 1.79 O 7 .