Title :
Microwave processing of high T/sub c/ oxide superconductors at oxygen atmosphere
Author :
Qiao, G.W. ; Zhang, J.S. ; Huang, J.G. ; Yang, Y.J. ; Cao, L.H. ; Wang, Y.Z. ; Jiang, M.
Author_Institution :
Inst. of Metal Res., Acad. Sinica, Shenyang, China
fDate :
3/1/1993 12:00:00 AM
Abstract :
A YBCO specimen with texture was manufactured by melt texture growth (MTG) processing. The bulk specimens of YBa/sub 2/Cu/sub 3/O/sub 6.4/ absorbed oxygen in a flowing oxygen atmosphere in a single-mode microwave furnace (TE10M) and during conventional postheat-treatment process. Their oxygen content was determined by weighing and by X-ray diffraction (XRD), and the superconductivity was also measured. The results indicated that the microwave process greatly enhanced oxygen diffusion and significantly increased the post-heat treatment-period compared with conventional processing.<>
Keywords :
X-ray diffraction examination of materials; barium compounds; ceramics; heat treatment; high-temperature superconductors; melting; self-diffusion in solids; sorption; stoichiometry; superconducting transition temperature; texture; yttrium compounds; O/sub 2/ absorption; X-ray diffraction; XRD; YBCO specimen; YBa/sub 2/Cu/sub 3/O/sub 6.4/; YBa/sub 2/Cu/sub 3/O/sub 7- delta /; high T/sub c/ oxide superconductors; high temperature superconductors; melt texture growth; microwave processing; oxygen atmosphere; oxygen content; oxygen diffusion; postheat-treatment process; superconductivity; texture; weighing; Atmosphere; Atmospheric measurements; Electromagnetic heating; Furnaces; Heat treatment; Oxygen; Superconductivity; Temperature; X-ray scattering; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
