The combined effects of firing temperature and soaking time on the microstructure of iron-rich porous ceramics have been studied by 57Fe-Mössbauer spectroscopy and 2D 1H nuclear magnetic resonance (NMR) relaxometry using a single-sided probe. Examining water-saturated ceramics using the relaxation correlation method, where longitudinal (T 1) and transverse (T 2) relaxation times are measured concurrently, provides information about firing-induced changes in both porosity (related to T 1) and magnetic properties (related to T 2). Comparing the information obtained from 1H-NMR analyses with that obtained from Mössbauer spectroscopy (which characterizes changes in iron-bearing species) shows that the T 1-T 2 NMR correlation technique is very sensitive to even subtle modifications in the magnetic behavior of Fe-bearing species. Moreover, the single-sided NMR approach allows us to perform millimeter-scale depth-resolved measurements, which can be used to non-invasively study the microstructural heterogeneities associated with non-uniform firing effects inside ceramics. This is in contrast to Mössbauer spectroscopy, which requires that the ceramic samples be ground. © 2012 American Institute of Physics.

Effects of time and temperature of firing on Fe-rich ceramics studied by Mössbauer spectroscopy and two-dimensional 1H-nuclear magnetic resonance relaxometry / Cinzia, Casieri; DE LUCA, Francesco; Luca, Nodari; Umberto, Russo; Camilla, Terenzi; Valentina, Tudisca. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - 112:8(2012), pp. 084904-1-084904-15. [10.1063/1.4759316]

Effects of time and temperature of firing on Fe-rich ceramics studied by Mössbauer spectroscopy and two-dimensional 1H-nuclear magnetic resonance relaxometry

DE LUCA, Francesco;
2012

Abstract

The combined effects of firing temperature and soaking time on the microstructure of iron-rich porous ceramics have been studied by 57Fe-Mössbauer spectroscopy and 2D 1H nuclear magnetic resonance (NMR) relaxometry using a single-sided probe. Examining water-saturated ceramics using the relaxation correlation method, where longitudinal (T 1) and transverse (T 2) relaxation times are measured concurrently, provides information about firing-induced changes in both porosity (related to T 1) and magnetic properties (related to T 2). Comparing the information obtained from 1H-NMR analyses with that obtained from Mössbauer spectroscopy (which characterizes changes in iron-bearing species) shows that the T 1-T 2 NMR correlation technique is very sensitive to even subtle modifications in the magnetic behavior of Fe-bearing species. Moreover, the single-sided NMR approach allows us to perform millimeter-scale depth-resolved measurements, which can be used to non-invasively study the microstructural heterogeneities associated with non-uniform firing effects inside ceramics. This is in contrast to Mössbauer spectroscopy, which requires that the ceramic samples be ground. © 2012 American Institute of Physics.
2012
01 Pubblicazione su rivista::01a Articolo in rivista
Effects of time and temperature of firing on Fe-rich ceramics studied by Mössbauer spectroscopy and two-dimensional 1H-nuclear magnetic resonance relaxometry / Cinzia, Casieri; DE LUCA, Francesco; Luca, Nodari; Umberto, Russo; Camilla, Terenzi; Valentina, Tudisca. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - 112:8(2012), pp. 084904-1-084904-15. [10.1063/1.4759316]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/486552
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