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Magnetic susceptibilities and thermal expansion of artificial graphites; Susceptibilites magnetiques et dilatation thermique des graphites artificiels

Abstract

Starting from measurements of the magnetic susceptibility made in the two principal directions of a graphite bar, the distribution function of the normals to the carbon planes in the crystallites has been evaluated. The effect of different variation in the manufacturing process on this crystalline anisotropy has been studied. From this crystalline anisotropy we have calculated the thermal expansion coefficient possessed by a compact mass of crystallites having exactly the same orientational anisotropy as the porous body consideration. The difference between this and the observed expansion coefficient leads to the determination of the expansion of the non-graphitic part of the mass which turns out to have a negative value and is also anisotropic. We have attempted to draw some conclusions from this result. (author) [French] En partant des mesures de la susceptibilite magnetique faites dans les directions des axes principaux d'un barreau de graphite, on a calcule la fonction de distribution des perpendiculaires aux plans graphitiques dans les cristallites. On a etudie les effets que pouvaient provoquer des modifications dans le procede de fabrication sur l'anisotropie cristalline. En considerant cette anisotropie cristalline, nous avons calcule le coefficient de dilatation thermique pour un bloc compact de cristallites ayant exactement la meme  More>>
Authors:
Cornuault, P; Herpin, A; Hering, H; Seguin, M; [1]  Commissariat a l'Energie Atomique, Saclay (France).Centre d'Etudes Nucleaires]
  1. Commissariat a l'Energie Atomique, Paris (France)
Publication Date:
Jul 01, 1960
Product Type:
Technical Report
Report Number:
CEA-R-1459
Resource Relation:
Conference: Proceeding of 1957 conference on carbon, Buffalo (United States), 1957; Other Information: 6 refs
Subject:
36 MATERIALS SCIENCE; ANISOTROPY; CARBON BLACK; CARTESIAN COORDINATES; CORRECTIONS; CRYSTAL STRUCTURE; DILATOMETRY; EXTRUSION; FARADAY METHOD; FERROMAGNETIC MATERIALS; GRAPHITE; IMPREGNATION; IMPURITIES; MAGNETIC FIELDS; MAGNETIC SUSCEPTIBILITY; POLYCRYSTALS; TEXTURE; THERMAL EXPANSION
OSTI ID:
20951800
Research Organizations:
CEA Saclay, 91 - Gif-sur-Yvette (France)
Country of Origin:
France
Language:
English; French
Other Identifying Numbers:
TRN: FR07R1459102026
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
5 pages
Announcement Date:
Dec 21, 2007

Citation Formats

Cornuault, P, Herpin, A, Hering, H, Seguin, M, and Commissariat a l'Energie Atomique, Saclay (France).Centre d'Etudes Nucleaires]. Magnetic susceptibilities and thermal expansion of artificial graphites; Susceptibilites magnetiques et dilatation thermique des graphites artificiels. France: N. p., 1960. Web.
Cornuault, P, Herpin, A, Hering, H, Seguin, M, & Commissariat a l'Energie Atomique, Saclay (France).Centre d'Etudes Nucleaires]. Magnetic susceptibilities and thermal expansion of artificial graphites; Susceptibilites magnetiques et dilatation thermique des graphites artificiels. France.
Cornuault, P, Herpin, A, Hering, H, Seguin, M, and Commissariat a l'Energie Atomique, Saclay (France).Centre d'Etudes Nucleaires]. 1960. "Magnetic susceptibilities and thermal expansion of artificial graphites; Susceptibilites magnetiques et dilatation thermique des graphites artificiels." France.
@misc{etde_20951800,
title = {Magnetic susceptibilities and thermal expansion of artificial graphites; Susceptibilites magnetiques et dilatation thermique des graphites artificiels}
author = {Cornuault, P, Herpin, A, Hering, H, Seguin, M, and Commissariat a l'Energie Atomique, Saclay (France).Centre d'Etudes Nucleaires]}
abstractNote = {Starting from measurements of the magnetic susceptibility made in the two principal directions of a graphite bar, the distribution function of the normals to the carbon planes in the crystallites has been evaluated. The effect of different variation in the manufacturing process on this crystalline anisotropy has been studied. From this crystalline anisotropy we have calculated the thermal expansion coefficient possessed by a compact mass of crystallites having exactly the same orientational anisotropy as the porous body consideration. The difference between this and the observed expansion coefficient leads to the determination of the expansion of the non-graphitic part of the mass which turns out to have a negative value and is also anisotropic. We have attempted to draw some conclusions from this result. (author) [French] En partant des mesures de la susceptibilite magnetique faites dans les directions des axes principaux d'un barreau de graphite, on a calcule la fonction de distribution des perpendiculaires aux plans graphitiques dans les cristallites. On a etudie les effets que pouvaient provoquer des modifications dans le procede de fabrication sur l'anisotropie cristalline. En considerant cette anisotropie cristalline, nous avons calcule le coefficient de dilatation thermique pour un bloc compact de cristallites ayant exactement la meme anisotropie d'orientation que le corps poreux en question. La difference entre cette valeur et celle mesuree du coefficient de dilatation, nous permet de calculer la dilatation pour la partie non-graphitique du bloc, en l'occurence, on trouve une valeur negative du coefficient pour cette partie, qui est egalement anisotropique. On a essaye d'en tirer quelques conclusions. (auteur)}
place = {France}
year = {1960}
month = {Jul}
}