caa a22 4500 469041919 CHVBK 20180323132813.0 cr unu---uuuuu 170328e19920201xx s 000 0 eng 10.1007/BF02848270 doi (NATIONALLICENCE)springer-10.1007/BF02848270 Critical current in Ag/BPSCCO tapes using low purity materials [Elektronische Daten] [S Shukla, Y Reddy, R Sharma] Silver-clad Bi1·7Pb0·4Sr1·8Ca2Cu3·5O x (BPSCCO) tapes have been fabricated using low purity (98-99%) starting materials and following the powder-in-tube technique. MaximumJ c values of 6·14 × 103 A·cm−2 at 77 K and 1·4 × 105 A·cm−2 at 4·2 K have been obtained in tapes subjected to the process of intermediate rolling and sintering. The bulk superconducting material used for the tape-fabrication contains both 2223 and 2212 phases in the ratio 60:40. A pure phase material and the optimization of the sintering parameters are expected to yield much higherJ c values at 77 K. It is possible that the copper-rich phase(s) and/or a small amount of iron impurity (60 ppm) present in CuO might be acting as flux pinning sites and could be responsible for highJ c values. Indian Academy of Sciences, 1992 Critical current density nationallicence tapes nationallicence BPSCCO system nationallicence sintering nationallicence flux pinning nationallicence powder-in-tube technique nationallicence 74·60 nationallicence Shukla S. National Physical Laboratory, 110 012, New Delhi, India aut Reddy Y. National Physical Laboratory, 110 012, New Delhi, India aut Sharma R. National Physical Laboratory, 110 012, New Delhi, India aut Pramana Springer India 38/2(1992-02-01), 179-188 0304-4289 38:2<179 1992 38 12043 https://doi.org/10.1007/BF02848270 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02848270 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shukla S. National Physical Laboratory, 110 012, New Delhi, India aut NATIONALLICENCE 700 1- Reddy Y. National Physical Laboratory, 110 012, New Delhi, India aut NATIONALLICENCE 700 1- Sharma R. National Physical Laboratory, 110 012, New Delhi, India aut NATIONALLICENCE 773 0- Pramana Springer India 38/2(1992-02-01), 179-188 0304-4289 38:2<179 1992 38 12043 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer