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Charge‐Compensating Defect in Ceria‐Doped Strontium Barium Niobate by Electron Energy‐Loss Spectroscopy and X‐ray Photoelectron Spectroscopy
Author(s) -
Shiue JyhTzong,
Fang TsangTse
Publication year - 2004
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.1551-2916.2004.00391.x
Subject(s) - x ray photoelectron spectroscopy , cerium , valence (chemistry) , doping , analytical chemistry (journal) , materials science , barium , binding energy , spectroscopy , chemistry , atomic physics , nuclear magnetic resonance , optoelectronics , physics , organic chemistry , chromatography , quantum mechanics , metallurgy
Undoped and CeO 2 ‐doped Sr 0.5 Ba 0.5 Nb 2 O 6 (SBN) powders were synthesized using the solid‐state reaction method. The lattice parameters of undoped and CeO 2 ‐doped SBN were evaluated using X‐ray diffractometry. The valence state of the cerium ion in Ce‐doped SBN was identified using X‐ray photoelectron spectroscopy (XPS), and the valence of 3+ was confirmed. The charge‐compensated defect of the cerium doping in SBN ceramics, i.e., excessive oxygen ions occupying the vacant O(4) or O(5) site, was further evidenced using electron energy‐loss spectroscopy (EELS) and XPS. The relationships of charge‐compensated defect, structure, binding energy, and temperature of the maximum of the relative permittivity ( T m ) were discussed.