Effect of oxygen partial pressure on the composition and structure of GdBa2Cu3O7−δ by solid state reaction. (December 2015)

• Record Type: Journal Article
• Authors: Tu, R.; Ke, W.; Zhang, S.; Wang, T.; Zhang, L. M.; Goto, T.
• Is Part Of: Materials research innovations. Volume 19(2015)Supplement 10
• Page Start: S10-21
• Page End: S10-25
• Publication Date: 2015-12
• Subjects: GdBa2Cu3O7−δ -- Oxygen partial pressure () -- Sintering atmosphere -- Stability phase diagram; Materials -- Research -- Periodicals; Matériaux -- Recherche -- Périodiques; 620.1105
• DOI: 10.1179/1432891715Z.0000000002078
• Languages: English
• ISSNs: 1432-8917

Abstract

Abstract : GdBa2 Cu3 O7− δ (GdBCO or Gd123) ceramics have been successfully prepared at oxygen partial pressure ( ) of 0.02–0.10 MPa via solid state reaction method by using Gd2 O3, BaCO3 and CuO powders as raw materials, whereas GdBa2 Cu3 O7− δ decomposed to Gd2 BaCuO5 (Gd211), Gd2 O3 and barium copper oxides owing to the instability of GdBa2 Cu3 O7− δ at according to the stability phase diagram of GdBa2 Cu3 O7− δ . Effect of on the phase structure and microstructure of GdBa2 Cu3 O7− δ has been investigated by X-ray diffractometer and field-emission scanning electron microscopy methods. Composition and microstructure of pellets sintered at were totally different from pellets sintered at .