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Pore-size evaluation by single-sided nuclear magnetic resonance measurements: Compensation of water self-diffusion effect on transverse relaxation
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10.1063/1.1833572
/content/aip/journal/jap/97/4/10.1063/1.1833572
http://aip.metastore.ingenta.com/content/aip/journal/jap/97/4/10.1063/1.1833572

Figures

Image of FIG. 1.
FIG. 1.

Graphic illustration of the “constant echo time method” for molecular self-diffusion coefficient measurement with CPMG sequences in the fixed magnetic-field gradient of a single-sided NMR instrument.

Image of FIG. 2.
FIG. 2.

The SEM images of samples ONE [(a), ] and 0406 [(b), ] and the MIP data (normalized to 100% of the maximum intrusion volume) showing the pore-throat distribution for samples ONE (c) and 0406 (d).

Image of FIG. 3.
FIG. 3.

evolution of distribution from some of the CPMG signals of samples ONE (a) and 0406 (b). The NMR signals have been acquired in homogeneous external magnetic-field conditions at . In (c), the average transverse relaxation rates vs are shown. The dashed and solid lines represent the fits in the case of free-diffusion in a constant gradient.

Image of FIG. 4.
FIG. 4.

The CPMG results taken with different on samples ONE (a) and 0406 (b). The values utilized in this measurement were , and . The NMR signals have been acquired in inhomogeneous external magnetic-field conditions at .

Image of FIG. 5.
FIG. 5.

evolution of distribution from the CPMG signals of samples ONE (a) and 0406 (b). The NMR signals have been acquired in inhomogeneous external magnetic-field conditions at . In (c), the average transverse relaxation rates vs are shown. The dashed and solid lines represent the fits in the case of free-diffusion in a constant gradient.

Image of FIG. 6.
FIG. 6.

Some ratio functions, , and with on samples ONE (a) and 0406 (b). The best fits were obtained by utilizing (5).

Image of FIG. 7.
FIG. 7.

Corrected CPMG decays, obtained by taking into account the diffusion term, on samples ONE (a) and 0406 (b). The original data, also shown, were acquired with the surface instrument at the shortest interpulse delay, .

Image of FIG. 8.
FIG. 8.

The CPMG results (a) taken with different on sample ONE, acquired in homogeneous external magnetic-field conditions at . Some ratio functions (b). In (c), the corrected CPMG decay (obtained by taking into account the diffusion term) and the original data acquired with the standard instrument at the shortest interpulse delay, .

Image of FIG. 9.
FIG. 9.

The CPMG results (a) taken with different on sample 0406, acquired in homogeneous external magnetic-field conditions at . Some ratio functions (b). In (c), the corrected CPMG decay and the original data acquired with the standard instrument at the shortest interpulse delay, .

Image of FIG. 10.
FIG. 10.

distributions from CPMG decays on samples ONE (a) and 0406 (b); the relaxation time data were acquired with the shortest interpulse delay, , with the standard NMR device (---) and the surface instrument (—). The two curves are compared with that obtained by correcting the data from surface device for diffusion (---).

Image of FIG. 11.
FIG. 11.

distributions from saturation-recovery data on samples ONE and 0406. The NMR signals have been acquired in homogeneous external magnetic fields with SPINMASTER (---) at and in inhomogeneous external magnetic fields with EUREKA-MOUSE10 (—) at .

Tables

Generic image for table
Table I.

Geometrical and structural data of artificial microporous porcelain samples, ONE and 0406; all the NMR experiments were done on both materials.

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/content/aip/journal/jap/97/4/10.1063/1.1833572
2005-01-20
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Pore-size evaluation by single-sided nuclear magnetic resonance measurements: Compensation of water self-diffusion effect on transverse relaxation
http://aip.metastore.ingenta.com/content/aip/journal/jap/97/4/10.1063/1.1833572
10.1063/1.1833572
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