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[en] The authors have prepared the flexible Ag-sheated Bi(Pb)-Sr-Ca-Cu-O superconducting composites by the powder-in-tube process. The critical current density Jc has reached 5000 A/cm2 (77K,OT), and the dependence of Jc on magnetic field is reduced to some extent. The improvement of the critical current density is considered due to the grain alignment and well connection between grains. Using these composites the authors succeeded in making gradient coils of magnetic flux transformers. Some results of bending test are also presented in this paper. (author). 14 refs., 6 figs., 1 tab
Source
Meiying Kong (ed.) (Chinese Academy of Sciences, Beijing (China). Institute of Semiconductors); Liji Huang (ed.) (Qinghua University (China). Department of Materials Science and Engineering); Chinese Materials Research Society International 1990 Symposia Proceedings; v. 1; 681 p; ISBN 0 444 88825 X; 
; ISBN 0 444 89016 5; ; 1991; p. 321-324; North-Holland; Amsterdam (Netherlands); Symposium N: Frontiers of Materials Research; Beijing (China); 18-22 Jun 1990; Symposium A: High Tc Superconductors; Beijing (China); 18-22 Jun 1990; Symposium D: Optoelectronic Materials and Functional Crystals; Beijing (China); 18-22 Jun 1990; C-MRS International Conference; Beijing (China); 18-22 Jun 1990; Available from Elsevier Science Publishers, P.O. Box 211, 1000 AE Amsterdam (NL)
; ISBN 0 444 89016 5; ; 1991; p. 321-324; North-Holland; Amsterdam (Netherlands); Symposium N: Frontiers of Materials Research; Beijing (China); 18-22 Jun 1990; Symposium A: High Tc Superconductors; Beijing (China); 18-22 Jun 1990; Symposium D: Optoelectronic Materials and Functional Crystals; Beijing (China); 18-22 Jun 1990; C-MRS International Conference; Beijing (China); 18-22 Jun 1990; Available from Elsevier Science Publishers, P.O. Box 211, 1000 AE Amsterdam (NL)