YBCO Oxalate Coprecipitation in Alcoholic Solutions

A process for synthesis of ultrafine YBa2Cu3O7–x powder by oxalate coprecipitation from nearly saturated solutions of the metal acetates and a 2‐propanol solution of oxalic acid was developed. The coprecipitation was complete within 5 min in an ice bath at 0–2°C. The final stoichiometry was Y:Ba:Cu...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of the American Ceramic Society 1994-06, Vol.77 (6), p.1436-1440
Hauptverfasser: Shter, Gennady E., Grader, Gideon S.
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:A process for synthesis of ultrafine YBa2Cu3O7–x powder by oxalate coprecipitation from nearly saturated solutions of the metal acetates and a 2‐propanol solution of oxalic acid was developed. The coprecipitation was complete within 5 min in an ice bath at 0–2°C. The final stoichiometry was Y:Ba:Cu = 1:1.994:2.991, while the particle size and surface area in the homogeneous coprecipitated powder were 0.1–0.2 pm and 24.9 m2.g−1, respectively. Because of the uniformity and particle size of the coprecipitated material, reactive YBCO powder with a surface area of 1.7 m2.g−1 can be obtained at 780°C in about 12 h.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.1994.tb09740.x