Ag-sheathed BiPbSrCaO(2223)superconducting tapes prepared by the powder-in-tube technique were inVeSgated. The Mswt of M layCr and the Jc at 77 K are spengly dspendent on the amouDt of cold wotheg and annchg condition...Ag-sheathed BiPbSrCaO(2223)superconducting tapes prepared by the powder-in-tube technique were inVeSgated. The Mswt of M layCr and the Jc at 77 K are spengly dspendent on the amouDt of cold wotheg and annchg condition. The Jc bo by uhahal tw aha drawing and rolling. The OPbown annwtg theperawt, boe and coohag de tO madrihe Jc vaiueS were in the range 84()-- 850t, 1bo^2bo h and 50-- loot / h, nyhvejy. The mndum tuSPOrt Jt at 77 K under zero mopetic field was l.33 x l04 A / cm2.展开更多
The effects of sintering on the microstructure and the critical current density of Ag-sheathed BiPbSrCaCuO (2223) superconducting tapes prepared by the powder-in-tube technique were in- vestigated. The microstructure ...The effects of sintering on the microstructure and the critical current density of Ag-sheathed BiPbSrCaCuO (2223) superconducting tapes prepared by the powder-in-tube technique were in- vestigated. The microstructure of oxide layer and the J_C at 77 K were strongly dependent on the sintering condition. The optimum sintering temperature, time and cooling rate to maximize J_C values were in the range about 840-850℃, 100-200 h and 50-100℃/h, respectively.展开更多
A scanning electron microscopy study of the morphology of laser ablated superconducting targets. bothYBaCuO and BipbSrCaCuO, was reported. The effects of laser ablation on target structures are illustratedto provide a...A scanning electron microscopy study of the morphology of laser ablated superconducting targets. bothYBaCuO and BipbSrCaCuO, was reported. The effects of laser ablation on target structures are illustratedto provide a basis for further quality control of laser ablation of superconducting thin films.展开更多
Ⅰ. INTRODUCTIONWe have known that the addition of Pb to BiSrCaCuO superconductors enhances high-T_c phase (i.e., 2223 phase, c=37, T_c≈110K)formation and that zero resistance at 132 K has been observed in BiPbSbSrCa...Ⅰ. INTRODUCTIONWe have known that the addition of Pb to BiSrCaCuO superconductors enhances high-T_c phase (i.e., 2223 phase, c=37, T_c≈110K)formation and that zero resistance at 132 K has been observed in BiPbSbSrCaCuO system. It is desirable to study doping other elements to the Bi-system with the variation of the nominal atomic ratio of展开更多
文摘Ag-sheathed BiPbSrCaO(2223)superconducting tapes prepared by the powder-in-tube technique were inVeSgated. The Mswt of M layCr and the Jc at 77 K are spengly dspendent on the amouDt of cold wotheg and annchg condition. The Jc bo by uhahal tw aha drawing and rolling. The OPbown annwtg theperawt, boe and coohag de tO madrihe Jc vaiueS were in the range 84()-- 850t, 1bo^2bo h and 50-- loot / h, nyhvejy. The mndum tuSPOrt Jt at 77 K under zero mopetic field was l.33 x l04 A / cm2.
文摘The effects of sintering on the microstructure and the critical current density of Ag-sheathed BiPbSrCaCuO (2223) superconducting tapes prepared by the powder-in-tube technique were in- vestigated. The microstructure of oxide layer and the J_C at 77 K were strongly dependent on the sintering condition. The optimum sintering temperature, time and cooling rate to maximize J_C values were in the range about 840-850℃, 100-200 h and 50-100℃/h, respectively.
文摘A scanning electron microscopy study of the morphology of laser ablated superconducting targets. bothYBaCuO and BipbSrCaCuO, was reported. The effects of laser ablation on target structures are illustratedto provide a basis for further quality control of laser ablation of superconducting thin films.
文摘Ⅰ. INTRODUCTIONWe have known that the addition of Pb to BiSrCaCuO superconductors enhances high-T_c phase (i.e., 2223 phase, c=37, T_c≈110K)formation and that zero resistance at 132 K has been observed in BiPbSbSrCaCuO system. It is desirable to study doping other elements to the Bi-system with the variation of the nominal atomic ratio of
