Oxidation induced decomposition of YBa2Cu3O7-x

At low oxygen potentials, YBa2Cu3O7−x decomposes by chemical reactions involving reduction. The results of this study show that the compound also decomposes at higher oxygen potentials. The initial decomposition products were found to be Y2BaCuO5 and a Ba-Cu oxide phase. The Ba-Cu phase was found to...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Journal of applied physics 1991-07, Vol.70 (2), p.906-913
Hauptverfasser:	WILLIAMS, R. K, ALEXANDER, K. B, BRYNESTAD, J, HENSON, T. J, KROEGER, D. M, LINDEMER, T. B, MARSH, G. C, SCARBROUGH, J. O, SPECHT, E. D
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemistry Exact sciences and technology Inorganic chemistry and origins of life Kinetics and mechanism of reactions
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	At low oxygen potentials, YBa2Cu3O7−x decomposes by chemical reactions involving reduction. The results of this study show that the compound also decomposes at higher oxygen potentials. The initial decomposition products were found to be Y2BaCuO5 and a Ba-Cu oxide phase. The Ba-Cu phase was found to be a peroxide-type and the decomposition can be described by a chemical reaction involving oxidation: 4(YBa2Cu3O7−x)+(1/2 − 3/2δ +2x)O2⇄2Y2BaCuO5+3Ba2Cu3O6−δ+CuO. At 800 °C the equilibrium pressure for this reaction is slightly
ISSN:	0021-8979 1089-7550
DOI:	10.1063/1.349597