PREPARATION ET CARACTERISATION DU TETRAFLUORURE DE ZIRCONIUM ULTRA-PUR PDF Download

Author: MARTINE.. BRIDENNE ALAUX
Publisher:
ISBN:
Category :
Languages : fr
Pages : 151

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SYNTHESE DE ZRF::(4) A PARTIR D'UN COMPOSE VOLATIL ZR(BH::(4))::(4), A TEMPERATURE AMBIANTE. APPAREILLAGE

Author: REGIS.. TORTEVOIS
Publisher:
ISBN:
Category :
Languages : fr
Pages :

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LA SYNTHESE DU TETRAFLUORURE DE ZIRCONIUM ULTRA-PUR ANHYDRE, PRINCIPAL COMPOSANT DES FIBRES OPTIQUES A BASE DE FLUOROZIRCONATE, A PARTIR DU TETRABOROHYDRURE DE ZIRCONIUM A ETE RECHERCHEE SELON UN PROCEDE NON POLLUANT. PARMI LES AGENTS FLUORANTS UTILISES, LE TRIFLUORURE D'AZOTE NE REAGIT PAS AVEC ZR(BH#4) LE DIFLUORURE DE XENON, REAGIT TROP VIOLEMMENT ET CONDUIT A DES PHASES RICHES RICHES EN BORE. LA FLUORATION DE ZR(BH#4)#4 EN SOLUTION, DANS UN SOLVANT COMPATIBLE, A PERMIS DE REDUIRE LES TEMPS DE REACTION ET LA DEGRADATION DE ZR(BH#4)#4. LES MEILLEURS RESULTATS ONT ETE OBTENUS LORS DE LA FLUORATION EN SOLUTION DANS CFCL#3 A 40#OC PAR HF ANHYDRE, DANS UN REACTEUR EN POLYMERE FLUORE. NOUS AVONS ANALYSE, A PARTIR DES METHODES D'ANALYSE TRES PERFORMANTES PAR ABSORPTION ATOMIQUE EN FOUR GRAPHITE ET PAR ACTIVATION PROTONIQUE, LA PURETE DE ZRCL#4, ZRF#4 ET ZR(OC#2H#5)#4 PREPARE A PARTIR DE ZR(BH#4)#4 ET C#2H#5OH. LES CONCENTRATIONS POUR LES PRINCIPAUX METAUX DE TRANSITION (FE, CO, NI, CU) SONT DE L'ORDRE DE QUELQUES PPB POUR ZR(OC#2H#5)#4 ET VOISINES OU INFERIEURES A LA PPM AU SEIN DU ZRF#4 AU STADE FINAL. NOUS AVONS EGALEMENT ETUDIE LA DESHYDRATATION DE ZRF#4, H#2O ET ZRF#4, 3H#2O A TEMPERATURE AMBIANTE PAR CLF#3 EN PHASE GAZEUSE ET LIQUIDE. CE PROCEDE DE DESHYDRATATION A UNE TEMPERATURE EXCEPTIONNELLEMENT BASSE PERMET DE S'AFFRANCHIR DE LA PRESENCE D'OXYDES ET D'OXYFLUORURES AU SEIN DU TETRAFLUORURE DE ZIRCONIUM

Author: Joe L. Williams
Publisher:
ISBN:
Category : Fluorination
Languages : en
Pages : 12

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Author: C. J. Baroch
Publisher:
ISBN:
Category : Fluorides
Languages : en
Pages : 22

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Author: Maydom Chanthanasinh
Publisher:
ISBN:
Category :
Languages : en
Pages : 160

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PREPARATION ET DIAGRAMME TERNAIRE DANS LES SYSTEMES ZRF::(2)-BAF::(2)-THF::(4) ET ZRF::(2)-BAF::(2)-NDF::(3). ETUDE STRUCTURALE AUX RAYONS X ET PAR SPECTROSCOPIE. PROPRIETES PHYSIQUES PARTICULIERES.

Author:
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ISBN:
Category : Government publications
Languages : en
Pages : 1400

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Author: Bjorn Mysen
Publisher: Elsevier
ISBN: 0444637095
Category : Science
Languages : en
Pages : 722

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Silicate Glasses and Melts, Second Edition describes the structure-property-composition relationships for silicate glasses and melts from a geological and industrial perspective. Updated sections include (i) characterization of silicate melt and COHN fluid structure (with and without dissolved silicate components) with pressure, temperature, and redox conditions and responses of structural variables to chemical composition, (ii) determination of solubility and solution mechanisms of COHN volatiles in silicate melts and minerals and of solubility and solution mechanisms of silicate components in COHN fluids, and (iii) effects of very high pressure on structure and properties of melts and glasses. This new book is an essential resource for researchers in a number of fields, including geology, geophysics, geoscience, volcanology, material science, glass science, petrology and mineralogy. Brings together multidisciplinary research scattered across the scientific literature into one reference, with a focus on silicate melts and their application to natural systems Emphasizes linking melt properties to melt structure Includes a discussion of the pros and cons of the use of glass as a proxy for melt structure and properties Written by highly regarded experts in the field who, among other honors, were the 2006 recipients of the prestigious G.W. Morey award of the American Ceramic Society

Author: C. Suryanarayana
Publisher: CRC Press
ISBN: 1498763685
Category : Technology & Engineering
Languages : en
Pages : 543

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Reflecting the fast pace of research in the field, the Second Edition of Bulk Metallic Glasses has been thoroughly updated and remains essential reading on the subject. It incorporates major advances in glass forming ability, corrosion behavior, and mechanical properties. Several of the newly proposed criteria to predict the glass-forming ability of alloys have been discussed. All other areas covered in this book have been updated, with special emphasis on topics where significant advances have occurred. These include processing of hierarchical surface structures and synthesis of nanophase composites using the chemical behavior of bulk metallic glasses and the development of novel bulk metallic glasses with high-strength and high-ductility and superelastic behavior. New topics such as high-entropy bulk metallic glasses, nanoporous alloys, novel nanocrystalline alloys, and soft magnetic glassy alloys with high saturation magnetization have also been discussed. Novel applications, such as metallic glassy screw bolts, surface coatings, hyperthermia glasses, ultra-thin mirrors and pressure sensors, mobile phone casing, and degradable biomedical materials, are described. Authored by the world’s foremost experts on bulk metallic glasses, this new edition endures as an indispensable reference and continues to be a one-stop resource on all aspects of bulk metallic glasses.

Author: United States. Department of Transportation. Assistant Secretary for Governmental Affairs
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 80

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Author: Zay Jeffries
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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