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'Vanadium Niobium Oxides' in keywords
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1999 (1)
1997 (1)
1Author    L. Kirsten, F. Von Woedtke, H. OppermannRequires cookie*
 Title    Zu den Phasenbeziehungen im System V/Nb/O, IV. Die Festelektrolyt-Coulometrie (FEC) als Methode zur Aufklärung ternärer Zustandsgebiete am Beispiel des Systems V/Nb/O The Phase Relations in the System V/Nb/O, IV. Solid Electrolytic Coulometry (SEC) as a Method to Investigate Ternary Systems: V/Nb/O  
 Abstract    The observation of reductive decomposition with SEC-current-time-temperature curves on the binary line V20 5-Nb20 5 is a useful method to determine qualitatively and quantitatively ("quasi in situ") the known ternary coexistence regions. By reduction of V 0 2 the Magneli-Phases V/(0 2"_| are generated. The method is generally applicable and allows rapid information by reductive decompositon or oxidative formation in coexistence regions. The conditions of decomposition can be optimized for a given system. Slow solid-gas equi­ libria are not detectable by this method. 
  Reference    (Z. Naturforsch. 54b, 123—130 [1999]; eingegangen am 17. September 1998) 
  Published    1999 
  Keywords    Solid Electrolytic Coulometry, Vanadium Niobium Oxides, Phase Diagram 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0123.pdf 
 Identifier    ZNB-1999-54b-0123 
 Volume    54 
2Author    F. Von Woedtke, L. Kirsten, H. O. Pperm, AnnRequires cookie*
 Title    Zu den Phasenverhältnissen im System V/Nb/O, III Die Koexistenzbeziehungen der Mischkristallreihe V1_J t  
 Abstract    -NbJC 02 zu den binären und ternären Phasen der Subsysteme V 0 2/N b 02/V20 3 und V 0 2/N b 0 2/V20 5/Nb20 5 The Phase Relations in the System V /N b/O , III C oexistance R elations o f M ixed C rystals V j_ xN bxOT to the Binary and Ternary Phases o f Subsystem s V 0 2/N b 0 2/V 20 3 and V 0 2/N b 0 2/V 20 5/N b 20 5 Mixed crystals V|_^NbA0 2 exist about the whole area of quasibinary line V 0 2-N b02. The phase relations between these compositions V 0 2-N b 02 and the binary and ternary phases of the described subsystems were cleared using chemical transport reactions (CTR) and solid state reactions. A more precise phase diagram of the ternary system V/Nb/O is given for the temperature range of 900 -1000°C. 
  Reference    Z. Naturforsch. 52b, 1155—1164 (1997); eingegangen am 8. Juli 1997 
  Published    1997 
  Keywords    Vanadium Niobium Oxides, Mixed Crystals, Phase Relations, Phase Diagram 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-1155.pdf 
 Identifier    ZNB-1997-52b-1155 
 Volume    52