Title
One-Dimensional NMR Imaging of High-Temperature First-Drying in Monolithics
Author
Barakat, A.J.
Pel, L.
Adan, O.C.G.
Publication year
2018
Abstract
In this study a specialized high-temperature nuclear magnetic resonance (NMR) setup is presented for measuring free moisture in monolithic refractory castables during one-sided heating (100–300 °C). This setup makes use of a high thermal-stability Birdcage-coil for measuring the quantitative moisture content at high-temperatures, while also utilizing a mini-coil for calibrating transverse relaxation changes, as a function of temperature and hydration state, taking place in the sample throughout a drying experiment. We employ a high-temperature correction scheme that calibrates the effects of rising temperatures on the NMR signal. With this configuration, we can non-destructively measure moisture and temperature profiles continuously and achieve a spatial resolution of 2–3 mm for samples as long as 74 mm. After applying the NMR correction, we can extract information about the physical and chemical components of water as they are released from the porous matrix during first heat up. As a model material, we demonstrate the capability of our setup with a conventional castable after it has been cast and cured for 48 h. © 2018, The Author(s).
Subject
Magnetic resonance imaging
Moisture
Nuclear magnetic resonance spectroscopy
Extract informations
High thermal stability
Monolithic Refractories
Nuclear Magnetic Resonance (NMR)
Rising temperatures
Spatial resolution
Temperature profiles
Transverse relaxation
Nuclear magnetic resonance
To reference this document use:
http://resolver.tudelft.nl/uuid:63e3523d-f166-4cf2-8b60-09cc14aecc55
DOI
https://doi.org/10.1007/s00723-018-1018-x
TNO identifier
810135
ISSN
0937-9347
Source
Applied Magnetic Resonance, 49 (7), 739-753
Document type
article