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Domain Structure in Excess‐WO 3 Lead Complex Perovskite
Author(s) -
Uchikoba Fumio,
Sawamura Kentaro
Publication year - 1994
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.1151-2916.1994.tb05413.x
Subject(s) - materials science , ferroelectricity , crystallite , domain (mathematical analysis) , ternary operation , crystallography , shell (structure) , perovskite (structure) , ternary numeral system , chemistry , composite material , metallurgy , dielectric , optoelectronics , mathematical analysis , mathematics , computer science , programming language
Ferroelectric domain structures in the polycrystalline ternary system Pb(Mg 1/3 Nb 2/3 )O 3 –PbTiO 3 –Pb(Mg 1/2 W 1/2 )O 3 were investigated with regard to excess‐WO 3 addition. Core–shell domain structures were observed in the 2 wt% excess‐WO 3 specimens. Above 3 wt% excess‐WO 3 addition, the ferroelectric fringe pattern disappeared at the center of the grain, and ringlike domain structures were observed. This tendency became distinct in 5 wt% excess‐WO 3 addition, and clear, ringlike domain structures were observed. The structures that consisted of fringe shell parts and non‐fringe core parts were reversals of normal core–shell structures.