Bulk YBCO samples were prepared by PMP method. The nominal composition was Y123+xwt% Y211+10 wt% Ag2O (x= 0,15,25,40).The result of magnetic measurements indicated the sample with x= 1 5 at 77 K exhibited a J0 of 3. 9...Bulk YBCO samples were prepared by PMP method. The nominal composition was Y123+xwt% Y211+10 wt% Ag2O (x= 0,15,25,40).The result of magnetic measurements indicated the sample with x= 1 5 at 77 K exhibited a J0 of 3. 9 ×104 A/cm2 at 0.1 T and 2. 4 ×104A/cm2 at 1.0 T.The morphology of samples suggested that fine dispersed Y2BaCuO5 phase acts as effective pinning centers.展开更多
Bulk YBa2Cu3O7 samples were prepared by PMP method. Through adjusting ingredients and preparation procedures, a pellet with 3. 5 cm in diameter and 0. 9 cm in thickness was synthesized. A mass of 1. 3 kg on a magnet c...Bulk YBa2Cu3O7 samples were prepared by PMP method. Through adjusting ingredients and preparation procedures, a pellet with 3. 5 cm in diameter and 0. 9 cm in thickness was synthesized. A mass of 1. 3 kg on a magnet can be levitated at about 1 mm height at 77 K. The XRD and SEM indicated that magnetic lifting property can be enhanced by addition of Ag2O and Y2BaCuO5.展开更多
文摘Bulk YBCO samples were prepared by PMP method. The nominal composition was Y123+xwt% Y211+10 wt% Ag2O (x= 0,15,25,40).The result of magnetic measurements indicated the sample with x= 1 5 at 77 K exhibited a J0 of 3. 9 ×104 A/cm2 at 0.1 T and 2. 4 ×104A/cm2 at 1.0 T.The morphology of samples suggested that fine dispersed Y2BaCuO5 phase acts as effective pinning centers.
文摘Bulk YBa2Cu3O7 samples were prepared by PMP method. Through adjusting ingredients and preparation procedures, a pellet with 3. 5 cm in diameter and 0. 9 cm in thickness was synthesized. A mass of 1. 3 kg on a magnet can be levitated at about 1 mm height at 77 K. The XRD and SEM indicated that magnetic lifting property can be enhanced by addition of Ag2O and Y2BaCuO5.