Water-air saturation changes in restricted geometries studied by proton relaxation

Autor:	Paola Fantazzini, A. Brancolini, G.C. Borgia, Robert J. S. Brown, G Ragazzini
Rok vydání:	1994
Předmět:	Magnetic Resonance Spectroscopy Chemistry Air Relaxation (NMR) Biomedical Engineering Biophysics Analytical chemistry Water Thermodynamics Microporous material Dental Porcelain Water saturation Partial saturation Radiology Nuclear Medicine and imaging Porous medium Porosity Saturation (magnetic)
Zdroj:	Magnetic Resonance Imaging. 12:191-195
ISSN:	0730-725X
DOI:	10.1016/0730-725x(94)91513-x
Popis:	The results are reported of a systematic T 1 and T 2 investigation of natural (sandstones) and artificial (microporous porcelain) porous media, after each step of a water desaturation process by centrifugation in air. The analysis of the relaxation curves permitted distinguishing well the different behaviour of the natural samples as compared to the artificial ones, which can be explained by the different pore structures. In both kinds of samples the evolution of the relaxation time distributions yielded a clear picture of the changes of the water distribution in the pore framework following the displacement process, until irreducible water saturation was attained. The results are compatible with the assumption of a fixed amount of surface area contributing to the relaxation of decreasing amounts of fluid as S w is reduced.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f9582d8f78308618bdc623d245171cd https://doi.org/10.1016/0730-725x(94)91513-x Zobrazit plný text záznamu