In studies of the transport in porous materials it is important to
measure concentration profiles of moisture and ions
non-destructively. Nuclear Magnetic Resonance (NMR) is a powerful
technique to measure the time evolution of e.g. moisture profiles
with a high spatial resolution. However, many technological porous
materials contain large amounts of para-magnetic ions, which
complicates the NMR measurements. Therefore the moisture transport
is studied using specially developed NMR scanners which have
the possibility to measure quantitative using a Faraday shield. Here
a short overview is give of the instruments and the main
characteristics
1.5 T - 60 Mhz (Philips)
3D medical imaging
insert high temperature >300oC,
grad 0.3 T/m
H/Na imaging
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