Title :
Continuous melt processing of YBCO thick films on zirconia rods
Author :
Holt, T.B. ; Grovenor, C.R.M. ; Button, T.W. ; Alford, N.M. ; Dew-Hughes, D.
Author_Institution :
Oxford Univ., UK
fDate :
3/1/1993 12:00:00 AM
Abstract :
Studies of 50- mu m-thick films of YBa/sub 2/Cu/sup 3/O/sub 7- delta / on yttria-stabilized zirconia rods, which have been melt-processed using an infrared furnace, are reported. The results indicate that J/sub c/´s higher than the 3000 A/cm/sup 2/ achieved so far are not impossible. Transport and magnetization results suggest that the increase in J/sub c/ is due to alignment of the grains along the axis of the rod. This is confirmed by the scanning electron microscopy photographs, which show an increase in grain size and alignment.<>
Keywords :
barium compounds; critical current density (superconductivity); crystal growth from melt; grain size; high-temperature superconductors; magnetisation; scanning electron microscope examination of materials; sintering; superconducting transition temperature; surface texture; yttrium compounds; 50 micron; 77 K; SEM; Y/sub 2/O/sub 3/-ZrO/sub 2/ rods; YBCO thick films; YBa/sub 2/Cu/sub 3/O/sub 7- delta / thick film; continuous melt processing; critical temperature; grains alignment; infrared furnace; infrared melt texturing; magnetization; scanning electron microscopy photographs; sintering; Furnaces; Grain boundaries; Lamps; Magnetic analysis; Magnetic materials; Magnetization; Melt processing; Temperature; Thick films; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
