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Direct Compositional Analysis of Ordered Domains in Pure and La‐Doped Pb(Mg 1/3 Nb 2/3 )O 3 by Analytical Electron Microscopy Techniques
Author(s) -
Miao Shu,
Zhang Xiaowen,
Zhu Jing
Publication year - 2001
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.1151-2916.2001.tb00963.x
Subject(s) - high resolution transmission electron microscopy , transmission electron microscopy , doping , valence (chemistry) , chemical composition , crystallography , analytical chemistry (journal) , materials science , valence electron , electron , chemistry , nanotechnology , physics , optoelectronics , organic chemistry , chromatography , quantum mechanics
The ordered domain structures in Pb(Mg 1/3 Nb 2/3 )O 3 (PMN) and Pb 1– x La x (Mg 1/3 Nb 2/3 )O 3 are identified using high‐resolution transmission electron microscopy (HRTEM) and nanobeam diffractometry (NBD). The chemical compositions in the ordered domains and in the disordered matrices are also acquired using energy‐dispersive spectroscopy (EDS). The best matching computer‐simulated HRTEM image has a Mg 2+ /Nb 2+ ratio of return ½. There is no obvious chemical composition difference between the ordered domains and the disordered matrices. The number of the normalized total positive valence electrons remains almost constant in the ordered domains and in the disordered matrices for all the samples. The reason for the growth of the ordered domains in La‐doped PMN also is discussed.