Identification of Local Phase of Nanoscale BaTiO 3 Powders by High-Resolution Electron Energy Loss Spectroscopy

Abstract The electron energy loss spectroscopy (EELS) technique was applied to investigate the local variation in the phase of barium titanate (BaTiO 3 ) ceramics. It was found that the fine structure of the titanium L 2,3 edge and their satellite peaks were sensitively varied with the tetragonal–cu...

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Bibliographic Details
Published inMicroscopy and microanalysis Vol. 19; no. S5; pp. 123 - 126
Main Authors Moon, Sun-Min, Wang, Xiaohui, Cho, Nam-Hee
Format Journal Article
LanguageEnglish
Published 01.08.2013
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Summary:Abstract The electron energy loss spectroscopy (EELS) technique was applied to investigate the local variation in the phase of barium titanate (BaTiO 3 ) ceramics. It was found that the fine structure of the titanium L 2,3 edge and their satellite peaks were sensitively varied with the tetragonal–cubic phase transition. The peak splitting of Ti-L 3 edge of tetragonal-phased BaTiO 3 ceramics was widened because of the increased crystal field effect compared with that of cubic-phased BaTiO 3 . In case of nanoscale BaTiO 3 powders, the L 3 edge splitting of the core region was found to be smaller than that of the shell region. The energy gap between peaks t 2g and e g varied from 2.36 to 1.94 eV with changing the probe position from 1 to 20 nm from the surface. These results suggest that the EELS technique can be used to identify the local phase of sintered BaTiO 3 ceramics.
ISSN:1431-9276
1435-8115
DOI:10.1017/S1431927613012476