Title :
Melt textured process for YBCO in high magnetic fields
Author :
Awaji, S. ; Watanabe, K. ; Motokawa, M. ; Kuramochi, A. ; Fukase, T. ; Kimura, K.
Author_Institution :
Inst. of Mater. Res., Tohoku Univ., Sendai, Japan
fDate :
6/1/1999 12:00:00 AM
Abstract :
YBa/sub 2/Cu/sub 3/O/sub 7/ bulk samples were synthesized by the melt textured seeding process in high magnetic fields, using high field heat treatment equipment installed with an 11 T cryocooled superconducting magnet. The X-ray rocking curves of [005] and [006] indicate that the texture in grain of the YBa/sub 2/Cu/sub 3/O/sub 7/ matrix was improved by applying a magnetic field of only a few tesla. Moreover, it is found that the distribution of Y/sub 2/BaCuO/sub x/ particles was changed by applying a magnetic field of /spl ap/10 T. The critical current properties are remarkably influenced by applying a magnetic field during melt growth processing.
Keywords :
X-ray diffraction; barium compounds; critical currents; crystal microstructure; heat treatment; high-temperature superconductors; magnetocaloric effects; melt texturing; yttrium compounds; 10 T; 11 T; X-ray rocking curves; YBa/sub 2/Cu/sub 3/O/sub 7/; critical current; grain texture; high field heat treatment; high magnetic fields; high temperature superconductors; melt growth processing; melt textured seeding process; Building materials; Critical current density; Crystalline materials; Heat treatment; Magnetic fields; Magnetic materials; Powders; Superconducting magnets; Temperature; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
