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Picard, F.
Societe des Usines Chimiques Rhone-Poulenc, 94 - Vitry-sur-Seine (France)1990
Societe des Usines Chimiques Rhone-Poulenc, 94 - Vitry-sur-Seine (France)1990
AbstractAbstract
[en] Rare earth chlorides, bromides or iodides containing less than 1 wt% water and less than 3 wt% oxyhalide are dehydrated by a gas flow of hydrogen halide through the halide bed. Structural water can interfer in some applications for instance metal preparation by chemical or electrochemical reduction
[fr]
Un halogenure de terre rare de type chlorure, bromure, iodure contenant moins de 1,5% en poids d'eau et moins de 3% en poids d'oxyhalogenure est deshydrate par passage d'un courant d'hydrure d'halogene a travers la masse a deshydrater. L'eau de structure peut etre genante dans certaines applications, telles que par exemple, les procedes de reduction chimique ou electrochimique pour la production de metalOriginal Title
Halogenures de terres rares deshydrates et procede de production de ceux-ci
Primary Subject
Source
2 Nov 1990; 28 Apr 1989; 7 p; FR PATENT DOCUMENT 2646415/A/; FR PATENT APPLICATION 8905662; Available from Institut National de la Propriete Industrielle, Paris (France); Application date: 28 Apr 1989
Record Type
Patent
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AbstractAbstract
No abstract available
Primary Subject
Source
Kirchmayr, H.R. (ed.) (Technische Univ., Vienna (Austria)); Oesterreichische Physikalische Gesellschaft, Vienna; 216 p; 1984; p. B05; Electronic structure and properties of rare earth and actinide intermetallics; St. Poelten (Austria); 3-6 Sep 1984; Published in summary form only.
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Miscellaneous
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AbstractAbstract
[en] Various types of metal oxides with the perovskite structure were synthesized. In the ABO3 type with A = La and B = Co, Mn, part of the A-cations were substituted by Sr or Ce. A2BO4 oxides with A = La, B = Co were prepared as well and partially substituted by Sr. Finally, double perovskites were investigated. The catalytic effect of the oxides were tested for oxidation of hydrocarbons and CO and for the reduction of NO using automobile exhaust gas. The catalysts of the ABO3-type showed the best activity
Primary Subject
Source
Conference on New Developments in f-Elements; Leuven (Belgium); 4-7 Sep 1990
Record Type
Journal Article
Literature Type
Conference
Journal
European Journal of Solid State and Inorganic Chemistry; CODEN EJSCE; v. 28(Suppl.); p. 437-440
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Ramanathan, L.V.
Sociedade Brasileira de Geofisica, Rio de Janeiro, RJ (Brazil)1989
Sociedade Brasileira de Geofisica, Rio de Janeiro, RJ (Brazil)1989
AbstractAbstract
[en] The influence of superficial application of rare earth oxides such as CeO sub(2), La sub(2)O sub(3), Nd sub(2)O sub(3), Sm sub(2)O sub(3), and Gd sub(2)O sub (3) to AISI 304 and 310 stainless steels, on their isothermal oxidation behavior at 900 sup(0) and 1000 sup(0)C, and cyclic oxidation behavior between 20 sup(0) and 1000 sup(0)C has been studied. The application of rare earth oxides (REO) has been found to increase the oxidation resistance at AISI 304. No significant improvements in oxidation resistance of AISI 310 were noted. The oxidation resistance of AISI 304 was highest in the presence of CeO sub(2) on its surface. The other REO in decreasing order of influence on oxidation resistance are La sub(2)O sub(3), Nd sub(2)O sub(3), Sm sub(2)O sub(3) and Gd sub(2)O sub(3). SEM investigations of the oxide scale morphology revealed that the improved resistance is probably due to the formation of a thin layer of fine grained compact Cr sub(2)O sub(3) and the higher adhesion of the scale to its increased plasticity. (author)
Primary Subject
Source
1989; 8 p; 1. Congress of the Brazilian Geophysical Society; Rio de Janeiro, RJ (Brazil); 20-24 Nov 1989
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Miscellaneous
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AbstractAbstract
[en] The luminescence of several rare-earth cryptates is reported and discussed. Energy transfer from crypt and to central rare-earth ions has been observed with high efficiency
Primary Subject
Secondary Subject
Source
Struck, C.W (GTE Labs., Inc., Waltham, MA (USA)); DiBartolo, B. (Boston Coll., Chestnut Hill, MA (USA). Dept. of Physics); Yen, W.M. (Georgia Univ., Athens, GA (USA). Dept. of Physics and Astronomy); 305 p; 1988; p. 204-207; The Electrochemical Society; Pennington, NJ (USA); Symposium on luminescence science and technology; Chicago, IL (USA); 9-14 Oct 1988; CONF-881072--; The Electrochemical Society, 10 South Main St., Pennington, NJ 08534 (USA)
Record Type
Book
Literature Type
Conference
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INIS VolumeINIS Volume
INIS IssueINIS Issue
Iltis, A.; Maestro, P.
Societe des Usines Chimiques Rhone-Poulenc, 94 - Vitry-sur-Seine (France)1989
Societe des Usines Chimiques Rhone-Poulenc, 94 - Vitry-sur-Seine (France)1989
AbstractAbstract
[en] Pure rare earth borides are prepared by heating, between 1000 and 13000C, rare earth chlorides, aluminium and boron
[fr]
On prepare les borures de terres rares par chauffage entre 1000 et 13000C du melange chlorure de terre rare, aluminium et bore elementaireOriginal Title
Procede de preparation de borures de terres rares
Primary Subject
Source
27 Oct 1989; 22 Apr 1988; 9 p; FR PATENT DOCUMENT 2630428/A/; FR PATENT APPLICATION 8805332; Available from Institut National de la Propriete Industrielle, Paris (France); Application date: 22 Apr 1988
Record Type
Patent
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Reference NumberReference Number
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INIS IssueINIS Issue
Chauvin, Y.; Commereuc, D.; Hugues, F.; Olivier, H.; Saussine, L.
Institut Francais du Petrole (IFP), 92 - Rueil-Malmaison (France)1989
Institut Francais du Petrole (IFP), 92 - Rueil-Malmaison (France)1989
AbstractAbstract
[en] The synthesis is obtained by reaction of the metal on a Ketone or an ester in ether. These compounds can be used for olefin catalytic hydrogenation and polymerisation
[fr]
La synthese s'effectue par reaction du metal sur une cetone ou un ester en milieu ether. Utilisation de ces composes en synthese organique et pour la catalyseOriginal Title
Nouveau procede d'obtention d'organolanthanides, nouveaux composes ainsi obtenus et leur utilisation
Primary Subject
Source
16 Jun 1989; 9 Dec 1987; 9 p; FR PATENT DOCUMENT 2624512/A/; FR PATENT APPLICATION 8717270; Available from Institut National de la Propriete Industrielle, Paris (France); Application date: 9 Dec 1987
Record Type
Patent
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Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Dagys, R.; Anisimov, F.
Electronic structure and properties of rare earth and actinide intermetallics1984
Electronic structure and properties of rare earth and actinide intermetallics1984
AbstractAbstract
No abstract available
Primary Subject
Source
Kirchmayr, H.R. (ed.) (Technische Univ., Vienna (Austria)); Oesterreichische Physikalische Gesellschaft, Vienna; 216 p; 1984; p. CP23; Electronic structure and properties of rare earth and actinide intermetallics; St. Poelten (Austria); 3-6 Sep 1984; Published in summary form only.
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Miscellaneous
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AbstractAbstract
No abstract available
Primary Subject
Source
Kirchmayr, H.R. (ed.) (Technische Univ., Vienna (Austria)); Oesterreichische Physikalische Gesellschaft, Vienna; 216 p; 1984; p. CP05; Electronic structure and properties of rare earth and actinide intermetallics; St. Poelten (Austria); 3-6 Sep 1984; Published in summary form only.
Record Type
Miscellaneous
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Zinner, L.B.; Vicentini, G.
Sociedade Brasileira de Quimica, Rio de Janeiro, RJ (Brazil)1988
Sociedade Brasileira de Quimica, Rio de Janeiro, RJ (Brazil)1988
AbstractAbstract
[en] Published in summary form only
Original Title
Analise termica de compostos inorganicos
Primary Subject
Source
1988; 2 p; 4. National Symposium on Inorganic Chemistry; Rio de Janeiro, RJ (Brazil); 31 Aug - 2 Sep 1988
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Miscellaneous
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