MICROSTRUCTURE OF POROUS-MEDIA PROBED BY NMR TECHNIQUES IN SUBMICROMETER LENGTH SCALES

被引：28

作者：

KIMMICH, R

STAPF, S

CALLAGHAN, P

COY, A

机构：

[1] Sektion Kernresonanzspektroskopie, Universität Ulm

[2] Department of Physics and Biophysics, Massey University, Palmerston North

来源：

MAGNETIC RESONANCE IMAGING | 1994年 / 12卷 / 02期

关键词：

FIELD-CYCLING NMR RELAXATION SPECTROSCOPY; PULSED-GRADIENT SPIN-ECHO DIFFUSION MEASUREMENT; SURFACE DIFFUSION;

D O I：

10.1016/0730-725X(94)91552-0

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

It is shown that field-cycling NMR relaxation spectroscopy in combination with pulsed-gradient spin-echo diffusion studies especially in the supercon fringe field version are suitable techniques for the investigation of length scales of porous media in the range 10 Angstrom to 10 mu m. Data for water adsorbed in fineparticle agglomerates, porous glass and ceramics are reported. An orientational structure factor is introduced permitting the characterization of hydrated surfaces on the basis of reorientations mediated by translational displacements of the adsorbed molecules. Known lengths such as the mean pore or particle size have been reproduced in this way. In length scales beyond these structural elements, the geometry of the internal surfaces can be discussed in terms of wavenumber-space fractals.

引用

页码：339 / 343

页数：5

共 11 条

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