Title :
Evaluation of techniques for fabricating very fine grained YBa2Cu3O7-δ+Ag composites
Author :
Kramer, M.J. ; Arrasmith, S.R.
Author_Institution :
Dept. of Metall. & Ceramics, Iowa State Univ., Ames, IA, USA
fDate :
3/1/1991 12:00:00 AM
Abstract :
The authors have compared several blending techniques to make Ag+YBa2Cu3O7-δ (Y123) composites. A chemical precipitation route seems to give the best dispersion of the Ag but appears to cause some decomposition of the finer-grained fraction of the Y123. The lower intergranular porosity in these composites reduces the O2 uptake in the samples, necessitating longer oxygen anneals. Long oxygen anneals for the composites can be avoided by first sintering the Y123 with an oxygen anneal and then blending in the Ag
Keywords :
barium compounds; ceramics; composite superconductors; high-temperature superconductors; powder technology; silver; yttrium compounds; YBa2Cu3O7-δ-Ag; anneals; blending techniques; chemical precipitation; decomposition; dispersion; fabrication; high temperature superconductors; intergranular porosity; sintering; very fine grained composites; Annealing; Ceramics; Chemicals; Composite materials; Dispersion; Granular superconductors; High temperature superconductors; Inorganic materials; Magnetic analysis; Superconducting materials;
Journal_Title :
Magnetics, IEEE Transactions on
