THE INFLUENCE OF PRECURSOR VARIABLES ON THE PHASE FORMATION, MICROSTRUCTURE AND TRANSPORT PROPERTY OF Bi-2223/Ag TAPES
来源期刊：Acta Metallurgica Sinica2003年第2期
论文作者：J.M.Yoo J.W.Ko C.H.Jiang G.W.Qiao
Key words：Bi-2223/Ag tape; precursor powder; critical current density;
Abstract: The Bi-2223/Ag tapes were prepared with spray-died powders, which are of differentparticle sizes and phase assemblages by varying the annealing time in pure oxygen.Longer time annealing degraded the reactivity of precursor powder, which in turnresulted in an incomplete conversion from precursors to Bi-2223, porosity core andmisaligned grains in fully processed tapes. The best Jc in short pressed samples variedfrom 29.7 to 47kA/cm2 for the tapes made from different powders.
J.M.Yoo1，J.W.Ko1，C.H.Jiang2，G.W.Qiao2
(1.Materials Engineering Dept., Korea Institute of Machinery & Materials, 66 Sangnam-Dong, Changwon, 641-010, Korea;
2.Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110016, China)
Abstract:The Bi-2223/Ag tapes were prepared with spray-died powders, which are of differentparticle sizes and phase assemblages by varying the annealing time in pure oxygen.Longer time annealing degraded the reactivity of precursor powder, which in turnresulted in an incomplete conversion from precursors to Bi-2223, porosity core andmisaligned grains in fully processed tapes. The best Jc in short pressed samples variedfrom 29.7 to 47kA/cm2 for the tapes made from different powders.
Key words:Bi-2223/Ag tape; precursor powder; critical current density;
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