Radiolytic purification of CaO by electron beams

K. A. Mkhoyan, J. Silcox, M. A. McGuire, F. J. Disalvo

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Analysis of the electron energy loss spectra of core-level electronic transitions, O K- and Ca L 2,3 -edges, combined with composition-sensitive annular dark field imaging shows that under electron-beam irradiation portlandite can easily be transformed into calcium oxide. The low-loss region of the energy loss spectra measured before and after transformation also supports the observations. Two possible mechanisms of the electron beam-induced modification of the specimen, radiolysis and knock-on damage, are discussed, and it was found that radiolysis is likely to be the primary mechanism for this transformation of Ca(OH) 2 into CaO, while some knock-on damage is also expected.

Original languageEnglish (US)
Pages (from-to)2907-2917
Number of pages11
JournalPhilosophical Magazine
Volume86
Issue number19
DOIs
StatePublished - Jul 1 2006

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