The combined effect of firing temperature and soaking time on the microstructure of iron-rich porous ceramics has been studied by 57Fe-Mössbauer spectroscopy and 2D 1H nuclear magnetic resonance (NMR) relaxometry by using a single-sided probe. The application of the relaxation correlation method to water-saturated ceramics provides information about the firing-induced modifications in both porous and magnetic properties by the concurrent measurement of longitudinal (T1) and transverse (T2) relaxation times, respectively. The comparison between the characterization of firing-induced rearrangements in the iron-bearing species provided by Mössbauer and 1H-NMR analyses shows the high sensitivity of the T1-T2 NMR correlation technique to even subtle modifications in the magnetic behaviour of Fe-bearing species. Moreover, the single-sided NMR approach has allowed performing depth-resolved measurements at the millimeter-scale to non-invasively study the microstructural heterogeneities associated with non-uniform firing effects inside the ceramic material.

Effects of Time and Temperature of Firing on Fe-rich Ceramics Studied by Mössbauer Spectroscopy and 2D 1H-NMR Relaxometry

CASIERI RUSSO, Cinzia;
2012-01-01

Abstract

The combined effect of firing temperature and soaking time on the microstructure of iron-rich porous ceramics has been studied by 57Fe-Mössbauer spectroscopy and 2D 1H nuclear magnetic resonance (NMR) relaxometry by using a single-sided probe. The application of the relaxation correlation method to water-saturated ceramics provides information about the firing-induced modifications in both porous and magnetic properties by the concurrent measurement of longitudinal (T1) and transverse (T2) relaxation times, respectively. The comparison between the characterization of firing-induced rearrangements in the iron-bearing species provided by Mössbauer and 1H-NMR analyses shows the high sensitivity of the T1-T2 NMR correlation technique to even subtle modifications in the magnetic behaviour of Fe-bearing species. Moreover, the single-sided NMR approach has allowed performing depth-resolved measurements at the millimeter-scale to non-invasively study the microstructural heterogeneities associated with non-uniform firing effects inside the ceramic material.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11697/10632
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 7
social impact