Diffusion of Water in Bentonite Clay: Neutron Scattering Study

被引：2

作者：

Sharma, V. K. ^{[1
]}

Prabhudesai, S. A. ^{[1
]}

Dessai, R. Raut

Desa, J. A. Erwin

Mitra, S. ^{[1
]}

Mukhopadhyay, R. ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Div Solid State Phys, Bombay 400085, Maharashtra, India

来源：

SOLID STATE PHYSICS, VOL 57 | 2013年 / 1512卷

关键词：

Diffusion; Clay; Neutron Scattering;

D O I：

10.1063/1.4791339

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Diffusion of water confined in natural bentonite clay is studied using the quasi-elastic neutron scattering (QENS) technique. X-ray diffraction shows a well-defined crystalline structure of the clay with an interlayer spacing of 13 angstrom. The QENS experiment has been carried out on hydrated as well as dehydrated clay at 300 K. Significant quasi-elastic broadening was observed in case of hydrated bentonite clay whereas dehydrated clay did not show any broadening over the instrument resolution. Analysis of QENS data reveals that diffusion of water occurs through jump diffusion characterized by random distribution of jump lengths. Diffusion of water in clay is found to be hindered vis a vis bulk water.

引用

页码：918 / 919

页数：2

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