Superconducting properties of melt-textured RE–Ba–Cu–O (RE: Ho, Er and Y) bulk superconductors with various RE211 contents

YBa2Cu3O7−δ (Y-123) bulk superconductors with the addition of (0.0, 0.2, 0.4, 0.6, 0.8, and 1.0 wt.%) SnO2 nanoparticles were synthesised via a thermal treatment method. The influence of SnO2 addition on the superconducting properties by means of critical temperature, Tc, AC susceptibility, phase formation and microstructures, including its elemental composition analysis, were studied. Sharp superconducting transition, ∆Tc, and diamagnetic transition were obtained for all SnO2-added samples. It was observed that sample x = 0.4 with a Y-123 phase percentage of 95.8% gives the highest Tc, smallest ∆Tc, and the sharpest diamagnetic transition in the normalised susceptibility curves. The microstructure also showed an excess of Sn precipitates on the sample’s surface at x = 0.8 and above. As such, the best superconducting properties were observed at x = 0.4 SnO2 addition inside the Y-123 host sample.

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Comparison of the superconducting properties in GdBCO bulk superconductors fabricated with two different solid phases

Superconductor Science and Technology ◽

10.1088/0953-2048/28/3/035004 ◽

2015 ◽

Vol 28 (3) ◽

pp. 035004 ◽

Cited By ~ 7

Author(s):

Miao Wang ◽

Wan-Min Yang ◽

Jia-Wei Li ◽

Zhong-Ling Feng ◽

Peng-Tao Yang

Keyword(s):

Superconducting Properties ◽

Bulk Superconductors ◽

Solid Phases

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YBCO Bulk Superconductors with Sm Addition

Materials Science Forum ◽

10.4028/www.scientific.net/msf.891.483 ◽

2017 ◽

Vol 891 ◽

pp. 483-488 ◽

Cited By ~ 2

Author(s):

Daniela Volochová ◽

Vitaliy Antal ◽

Jozef Kováč ◽

Pavel Diko

Keyword(s):

Critical Current Density ◽

Critical Current ◽

Current Density ◽

Superconducting Properties ◽

Ybco Bulk ◽

Pinning Centers ◽

Bulk Superconductors ◽

Powder Addition ◽

Current Densities ◽

Precursor Powders

The influence of Sm addition on the microstructure and superconducting properties of Y-Ba-Cu-O (YBCO) bulk superconductors has been studied. Precursor powders YBa2Cu3O7-δ (Y-123), Y2O3 and CeO2 were enriched with different amounts of SmBa2Cu3Oy (Sm-123) or Sm2O3 powders with the aim to increase critical current density, Jc,by introducing additional pinning centers. YBCO bulk superconductors with SmBa2Cu3Oy (Y123-Sm) or Sm2O3 (Y123-SmO) powder addition were prepared by the optimized top seeded melt growth process in the form of single grains. Microstructure analysis revealed that Sm2O3 addition leads to a higher amount of smaller Y2BaCuO5 (Y-211) particles, what is related to high critical current densities (Jc ~ 7 x 104 A/cm2) of the YBCO samples with Sm2O3 addition in low magnetic fields. The effect of Sm addition in the form of SmBa2Cu3Oy as well as Sm2O3 powder on Y2BaCuO5 particle size, critical temperature, Tc, and critical current density, Jc, is reported.

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The Fabrication and Magnetic Shielding Properties of Melt Cast Bi‐Sr‐Ca‐Cu‐O

MRS Proceedings ◽

10.1557/proc-169-1279 ◽

1989 ◽

Vol 169 ◽

Author(s):

R.J. Rayne ◽

L.E. Toth ◽

B.A. Bender ◽

S.H. Lawrence ◽

R.J. Soulen ◽

...

Keyword(s):

Superconducting Devices ◽

Heat Treating ◽

Superconducting Properties ◽

Dimensional Control ◽

Magnetic Shields ◽

Bulk Superconductors ◽

Complex Shapes ◽

Shielding Properties ◽

New Processing ◽

Processing Techniques

AbstractMagnetic shields for SQUID applications were successfully fabricated using high Tc superconducting BSCCO. To produce shields with appropriate superconducting properties and close dimensional control, it was necessary to develop new processing techniques. Shields were produced by casting liquid BSCCO into molds, heat treating and machining. This technique is applicable to fabricating other types of superconducting devices requiring bulk superconductors with complex shapes and close dimensional control.

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