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Journal of Electron Microscopy Advance Access originally published online on August 1, 2009
Journal of Electron Microscopy 2009 58(6):349-355; doi:10.1093/jmicro/dfp035
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© The Author 2009. Published by Oxford University Press on behalf of Japanese Society of Microscopy. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org

HREM and EDS analysis of (La, M)TiO3 (M = Zn, Mn) prepared by M/Li ion exchange

Takao Tsurui1,*, Mashiko Wataru2, Masato Watanabe2, Tetsuhiro Katsumata2 and Yoshiyuki Inaguma2

1 Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577
2 Department of Chemistry, Faculty of Science, Gakushuin University, Mejiro 1-5-1, Toshima-ku, Tokyo 171-8588, Japan

* To whom correspondence should be addressed. E-mail: tsurui{at}imr.tohoku.ac.jp

High-resolution electron microscopy (HREM) and energy dispersive X-ray spectroscopy (EDS) studies of (La, M)TiO3 (M = Zn, Mn) prepared by M/Li ion exchange were performed to clarify the microscopic mechanism of ion-exchange reactions. At a macroscopic level, EDS analysis revealed that Zn and Mn atoms were homogeneously dispersed in matrix grains of (La, Zn)TiO3 and (La, Mn)TiO3 samples, respectively. EDS analysis also revealed that no segregation of Zn and Mn atoms was observed even in the vicinity of grain boundary regions. HREM and EDS analysis demonstrated that the microscopic mechanism of ion-exchange reactions was different by the ion-exchanged metals.

Keywords     perovskite, ion exchange, HREM, STEM–EDS, microstructure, inhomogeneity

Received      3 February 2009, accepted 10 June 2009


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