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Type: Artigo de periódico
Title: Mössbauer Spectral Changes In X-ray Preirradiated Polytetrafluoroethylene Iron (iii) Oxide Composite-interactions With Acrylic Acid
Author: de Barros G.G.
Vieira V.W.
Galembeck F.
Abstract: The Mo{combining double acute accent}ssbauer spectrum of Fe2O3 dispersed in PTFE is a doublet (IS=0.33 - 0.35 mm/s; QS=0.89 - 0.90 mm/s) and is unaltered by prolonged exposure to acrylic acid. Under exposure to X-rays, a new Fe (III) site is found, which differs from the preextant site in having a different microenvironment asymmetry. Acrylic acid treatment of preirradiated PTFE-iron (III) oxide composite generates an environment of a great distortion around iron nuclei as shown by the quadrupole splitting (QS=1.11 mm/s). These results show that X-rays sensitize Fe(III) towards asymmetric sites in finely dispersed iron (III) oxide particles in the amorphous region of the matrix. © 1988 Springer-Verlag.
Editor: Springer-Verlag
Rights: fechado
Identifier DOI: 10.1007/BF00255384
Date Issue: 1988
Appears in Collections:Unicamp - Artigos e Outros Documentos

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