Title :
YBCO/Ag bulk material by melt crystalization for cryomagnetic applications
Author :
Schatzle, P. ; Krabbes, G. ; Gruss, S. ; Fuchs, G.
Author_Institution :
Inst. of Solid State & Mater. Res., Dresden, Germany
fDate :
6/1/1999 12:00:00 AM
Abstract :
Based on thermoanalytic investigations a melt crystallization process was developed with reduced process temperatures and process times to produce YBCO/Ag monoliths (d=26 mm) achieving the homogenous distribution of small sized Ag inclusions. The mechanical properties are improved, but the superconducting properties at 77 K, B/sub 0/ (480 mT) and F/sub N/ (40 N) are slightly reduced compared with YBCO monoliths without an addition of Ag (750 mT and 65 N). The maximum trapped flux was increased to the value B/sub 0/ 9.4 T at 26.5 K, instead of 8.4 T in the Ag-free bulk monolith.
Keywords :
barium compounds; composite superconductors; crystal growth from melt; crystallisation; flux pinning; high-temperature superconductors; inclusions; materials preparation; mechanical properties; silver; texture; yttrium compounds; 26 mm; 26.5 K; 480 mT; 750 mT; 77 K; 8.4 T; 9.4 T; YBa/sub 2/Cu/sub 3/O/sub 7/-Ag; YBa/sub 2/Cu/sub 3/O/sub 7//Ag; bulk material; cryomagnetic applications; homogenous Ag inclusions distribution; mechanical properties; melt crystallization process; monoliths; reduced process temperature; reduced process time; superconducting properties; thermoanalytic investigations; trapped flux; Ceramics; Crystalline materials; Crystallization; Levitation; Magnetic fields; Magnetic materials; Mechanical factors; Solid state circuits; Temperature distribution; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
