Microstructural analysis of BSCCO-2212 wires for magnet application

Author

Lehndorff, B. ; Piel, H. ; Hortig, M. ; Schulz, G.W. ; Theisejans, R.

Author_Institution

Wuppertal Univ., Germany

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

1687

Lastpage

1690

Abstract

Short samples of silver-sheathed BSCCO-2212 wires were quenched out of different stages of the sintering process. Microstructural studies of the phase formation have been performed. The development of the superconducting core within these wires exhibit pronounced void formation. In addition it is observed, that silver agglomerates between grains all over the ceramic core. These studies were used to optimize the preparation of BSCCO-2212 wires of medium length. For functional studies of insulation material, small test coils were built from these materials and tested in a Gifford-McMahon-cryocooler. Magnetic fields were determined by a Hall probe measurement in the temperature range of 28 to 77 K.

Keywords

Hall effect; bismuth compounds; calcium compounds; critical currents; crystal microstructure; high-temperature superconductors; multifilamentary superconductors; silver; sintering; strontium compounds; superconducting coils; 28 to 77 K; Ag-Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub x/ sheathed wires; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O-Ag; Gifford-McMahon-cryocooler; Hall probe measurement; agglomerates; critical currents; insulation material; magnetic fields; microstructural analysis; multifilamentary wires; phase formation; sintering; small test coils; superconducting core; void formation; Insulation testing; Magnetic analysis; Magnetic cores; Magnetic field measurement; Magnetic materials; Materials testing; Superconducting coils; Superconducting magnets; Temperature measurement; Wires;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.620903

Filename

620903