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Study of the texture of porous solids using a technique of {gamma} ray absorption; Application de l'absorption du rayonnement {gamma} a l'etude de la texture des solides poreux

Abstract

A technique, which enables us to measure locally total porosity, open porosity and pore size distribution is developed. The total porosity is calculated from the bulk density. A gamma absorption gauge is set up fitted with a Cs137 source. This enables the determination of the density by layers of carbonaceous samples in a practically automatic way. By taking adequate precautions it is possible to obtain the density with a maximum error {delta}{rho} {<=} 0,005 g/cm{sup 3}. The open porosity is evaluated by the absorption method after impregnation with bromoform. A new mercury porosimeter is developed using the absorption probe for the measurement of mercury infiltrated into the porous sample. Due to the localized character of exploration by this technique, the variations of porous texture in a heterogeneous sample can be studied. Used as a classical porosimeter, in the case of homogeneous samples, this apparatus is capable of exploring the equivalent diameters of pores between 500 {mu} and 0.14 {mu} with a maximum error {delta}P {<=} 0.002. The possibility of exploration of heterogeneous samples, with the facility of determination of porosities due to macro-pores combined with the non-limiting character of the method in the field of high pressures differentiates this apparatus  More>>
Authors:
Ortega, M [1] 
  1. Commissariat a l'Energie Atomique, Grenoble (France). Centre d'Etudes Nucleaires
Publication Date:
Jan 01, 1967
Product Type:
Thesis/Dissertation
Report Number:
CEA-R-3204
Resource Relation:
Other Information: 27 refs
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; BROMOFORM; GAMMA RADIATION; MERCURY; PORE STRUCTURE; POROSIMETERS; POROSITY
OSTI ID:
20650695
Research Organizations:
CEA Grenoble, 38 (France); Faculte des Sciences de l'Universite de Grenoble, 38 (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR05R3204090308
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
[78] pages
Announcement Date:
Nov 23, 2005

Citation Formats

Ortega, M. Study of the texture of porous solids using a technique of {gamma} ray absorption; Application de l'absorption du rayonnement {gamma} a l'etude de la texture des solides poreux. France: N. p., 1967. Web.
Ortega, M. Study of the texture of porous solids using a technique of {gamma} ray absorption; Application de l'absorption du rayonnement {gamma} a l'etude de la texture des solides poreux. France.
Ortega, M. 1967. "Study of the texture of porous solids using a technique of {gamma} ray absorption; Application de l'absorption du rayonnement {gamma} a l'etude de la texture des solides poreux." France.
@misc{etde_20650695,
title = {Study of the texture of porous solids using a technique of {gamma} ray absorption; Application de l'absorption du rayonnement {gamma} a l'etude de la texture des solides poreux}
author = {Ortega, M}
abstractNote = {A technique, which enables us to measure locally total porosity, open porosity and pore size distribution is developed. The total porosity is calculated from the bulk density. A gamma absorption gauge is set up fitted with a Cs137 source. This enables the determination of the density by layers of carbonaceous samples in a practically automatic way. By taking adequate precautions it is possible to obtain the density with a maximum error {delta}{rho} {<=} 0,005 g/cm{sup 3}. The open porosity is evaluated by the absorption method after impregnation with bromoform. A new mercury porosimeter is developed using the absorption probe for the measurement of mercury infiltrated into the porous sample. Due to the localized character of exploration by this technique, the variations of porous texture in a heterogeneous sample can be studied. Used as a classical porosimeter, in the case of homogeneous samples, this apparatus is capable of exploring the equivalent diameters of pores between 500 {mu} and 0.14 {mu} with a maximum error {delta}P {<=} 0.002. The possibility of exploration of heterogeneous samples, with the facility of determination of porosities due to macro-pores combined with the non-limiting character of the method in the field of high pressures differentiates this apparatus from all the porosimeters of former conception. Examples of utilization of this technique in the case of graphite-gas reactions are presented. (author) [French] On a developpe une technique permettant la mesure localisee de la porosite totale, de la porosite ouverte et de la repartition de la taille de pores. La porosite totale est calculee a partir de la densite apparente. On a mis au point une jauge d'absorption du rayonnement gamma munie d'une source de Cs137. Celle-ci nous a permis de determiner la densite par couches d'echantillons cylindriques carbones d'une facon pratiquement automatique. En prenant les precautions adequates, il est possible d'obtenir la densite avec une erreur maximale {delta}{rho} {<=} 0,005 g/cm{sup 3}. La porosite ouverte a ete evaluee par la methode d'absorption apres impregnation au bromoforme. Un nouveau porosimetre au mercure a ete realise en utilisant la sonde d'absorption pour la mesure du mercure infiltre dans l'echantillon poreux. Grace au caractere localise de l'exploration on etudie, par cette technique, les variations de texture poreuse dans un echantillon heterogene. Utilise comme porosimetre classique dans le cas d'echantillons homogenes, cet appareil est capable d'explorer des diametres equivalents de pores compris entre 500 et 0,14 {mu} avec une erreur maximale, {delta}P {<=} 0,002. La possibilite d'exploration d'echantillons heterogenes jointe a la facilite de determination des porosites dues aux macropores et au caractere non limitatif de la methode dans le domaine des hautes pressions, differencient cet appareil de tous les porosimetres de conception anterieure. On presente des exemples d'utilisation de cette technique dans les cas de reactions graphite-gaz. (auteur)}
place = {France}
year = {1967}
month = {Jan}
}