"TITLE","AUTHORS","SUBJECT","SUBJECT_RELATED","DESCRIPTION","PUBLISHER","AVAILABILITY","RESEARCH_ORG","SPONSORING_ORG","PUBLICATION_COUNTRY","PUBLICATION_DATE","CONTRIBUTING_ORGS","LANGUAGE","RESOURCE_TYPE","TYPE_QUALIFIER","JOURNAL_ISSUE","JOURNAL_VOLUME","RELATION","COVERAGE","FORMAT","IDENTIFIER","REPORT_NUMBER","DOE_CONTRACT_NUMBER","OTHER_IDENTIFIER","DOI","RIGHTS","ENTRY_DATE","OSTI_IDENTIFIER","PURL_URL" "Reactivity of non-stoichiometric black alumina; Reactivite des alumines noires non stoechiometriques","Arghiropoulos, B; Elston, J; Hilaire, P; Juillet, F; Teichner, S J [Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires]; [Lyon-1 Univ., 69 (France)]","36 MATERIALS SCIENCE; ALUMINIUM OXIDES; AMORPHOUS STATE; CATALYTIC EFFECTS; CHEMICAL PROPERTIES; CHEMISORPTION; ELECTRIC CONDUCTIVITY; HEAT TREATMENTS; HYDROGEN; HYDROGENATION; N-TYPE CONDUCTORS; P-TYPE CONDUCTORS; POLYCRYSTALS; POWDERS; RECRYSTALLIZATION; SPECIFIC SURFACE AREA; STOICHIOMETRY; THERMODYNAMIC PROPERTIES","","Oxides such as alumina, when divided or poorly crystallized, show enhanced physico-chemical properties with respect to those of non-divided crystals of the same solids. A stoichiometric difference may even be produced in the alumina, which brings about a new modification of its properties. However its characteristics of hydrogen chemisorption or of catalytic activity in ethylene hydrogenation do not appear to depend on the stoichiometric difference. (author) [French] Les oxydes, comme l'alumine, divises ou mal cristallises, presentent des proprietes physico-chimiques exaltees par rapport a celles des memes solides en cristaux non divises. Un ecart a la stoechiometrie peut meme etre produit dans l'alumine, ce qui entraine une nouvelle modification de ses proprietes. Toutefois ses caracteristiques de chimisorption d'hydrogene ou d'activite catalytique d'hydrogenation d'ethylene ne semblent pas dependre de l'ecart a la stoechiometrie. (auteur)","","Available from INIS in electronic form","CEA Saclay, 91 - Gif-sur-Yvette (France)","","France","1960-07-01","","French","Technical Report","","","","Other Information: 22 refs","Miscellaneous","Medium: ED; Size: 17 pages","","CEA-R-1663","","TRN: FR07R1663105035","https://doi.org/","","2009-10-14","20953754","https://www.osti.gov/etdeweb/servlets/purl/20953754"