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Application of general methods for the study of porous materials to the determination of the characteristics of barriers; Application des methodes generales d'etudes des corps poreux a la determination des caracteristiques des barrieres

Abstract

Barriers foreseen for the separation of uranium isotopes by gaseous diffusion must posses pores of about 100 Angstrom radius and as high an output as possible. They should thus be of small but uniform thickness. In view of these conditions it is necessary to adapt the normal methods available for studying porous materials in order to check the characteristics of the prototypes examined. It has been found that only by cross-comparison of data from various methods can progress in the development of different prototypes be followed. The following account consists of two parts: 1) A review of the main experimental methods we have used: a) various absorption methods, b) electron microscopy, c) X-ray studies, d) mercury porosimetry, e) liquid permeability, f) gas permeability, g) measurement of separation efficiency. 2) Comparison of the results obtained using these various methods and their application with a view to acquiring as complete a knowledge as possible of the structure of the barrier. (author) [French] Les barrieres susceptibles d'etre utilisees pour la separation des isotopes de l'uranium, par diffusion gazeuse, doivent presenter des pores de rayon de l'ordre de 100 Angstrom et un debit aussi grand que possible. Elles doivent donc avoir une epaisseur faible  More>>
Authors:
Plurien, P; Charpin, J; Mommejac, S [1] 
  1. Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires
Publication Date:
Jul 01, 1958
Product Type:
Technical Report
Report Number:
CEA-R-1027
Resource Relation:
Other Information: 15 refs
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ALUMINIUM OXIDES; COMPARATIVE EVALUATIONS; DIFFUSION BARRIERS; EFFICIENCY; ELECTRON MICROSCOPY; GASEOUS DIFFUSION PROCESS; LEAKS; NICKEL; PERMEABILITY; PORE STRUCTURE; POROSIMETERS; POROSITY; POROUS MATERIALS; SINTERED MATERIALS; SPECIFIC SURFACE AREA; STRUCTURAL CHEMICAL ANALYSIS; TEFLON; THICKNESS; URANIUM 235; URANIUM 238; X-RAY DIFFRACTION
OSTI ID:
20912744
Research Organizations:
CEA Saclay, 91 - Gif-sur-Yvette (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR07R1027073920
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
24 pages
Announcement Date:
Sep 22, 2007

Citation Formats

Plurien, P, Charpin, J, and Mommejac, S. Application of general methods for the study of porous materials to the determination of the characteristics of barriers; Application des methodes generales d'etudes des corps poreux a la determination des caracteristiques des barrieres. France: N. p., 1958. Web.
Plurien, P, Charpin, J, & Mommejac, S. Application of general methods for the study of porous materials to the determination of the characteristics of barriers; Application des methodes generales d'etudes des corps poreux a la determination des caracteristiques des barrieres. France.
Plurien, P, Charpin, J, and Mommejac, S. 1958. "Application of general methods for the study of porous materials to the determination of the characteristics of barriers; Application des methodes generales d'etudes des corps poreux a la determination des caracteristiques des barrieres." France.
@misc{etde_20912744,
title = {Application of general methods for the study of porous materials to the determination of the characteristics of barriers; Application des methodes generales d'etudes des corps poreux a la determination des caracteristiques des barrieres}
author = {Plurien, P, Charpin, J, and Mommejac, S}
abstractNote = {Barriers foreseen for the separation of uranium isotopes by gaseous diffusion must posses pores of about 100 Angstrom radius and as high an output as possible. They should thus be of small but uniform thickness. In view of these conditions it is necessary to adapt the normal methods available for studying porous materials in order to check the characteristics of the prototypes examined. It has been found that only by cross-comparison of data from various methods can progress in the development of different prototypes be followed. The following account consists of two parts: 1) A review of the main experimental methods we have used: a) various absorption methods, b) electron microscopy, c) X-ray studies, d) mercury porosimetry, e) liquid permeability, f) gas permeability, g) measurement of separation efficiency. 2) Comparison of the results obtained using these various methods and their application with a view to acquiring as complete a knowledge as possible of the structure of the barrier. (author) [French] Les barrieres susceptibles d'etre utilisees pour la separation des isotopes de l'uranium, par diffusion gazeuse, doivent presenter des pores de rayon de l'ordre de 100 Angstrom et un debit aussi grand que possible. Elles doivent donc avoir une epaisseur faible et constante. Ces conditions necessitent une adaptation des methodes usuelles d'etude des corps poreux pour controler les caracteristiques des prototypes etudies. Il est apparu que seul le recoupement entre diverses methodes permet de suivre les progres dans la realisation de differents prototypes. L'expose qui va suivre comprend deux parties: 1) Une revue des principales methodes experimentales que nous utilisons: a) differentes methodes d'absorption, b) microscopie electronique, c) rayons X, d) porosimetrie a mercure, e) permeabilite aux liquides, f) permeabilite aux gaz, g) mesure de l'efficacite de separation. 2) Comparaison des differents resultats obtenus par ces diverses methodes et leur application a la connaissance la plus complete possible de la structure de la barriere. (auteur)}
place = {France}
year = {1958}
month = {Jul}
}