The influence of slow cooling on Y211 size and content in single-grain YBCO bulk superconductor through the infiltration-growth process

2017 ◽  
Vol 534 ◽  
pp. 37-44 ◽  
Author(s):  
A Ouerghi ◽  
N. Moutalbi ◽  
J.G. Noudem ◽  
A. M'chirgui
Keyword(s):  
Growth Process ◽  
Bulk Superconductor ◽  
Slow Cooling ◽  
Ybco Bulk ◽  
Single Grain ◽  
Infiltration Growth ◽  
Infiltration Growth Process

Microstructure YBCO Bulk Superconductors Fabricated by Infiltration Growth Process

2017 ◽  
Vol 891 ◽  
pp. 489-493 ◽  
Author(s):  
Liudmila Vojtkova ◽  
Pavel Diko
Keyword(s):  
Growth Process ◽  
Solid Phase ◽  
Polarized Light ◽  
Final Size ◽  
Ybco Bulk ◽  
Bulk Superconductors ◽  
First Case ◽  
Single Grain ◽  
Infiltration Growth ◽  
Infiltration Growth Process

Single grain YBCO bulk superconductors were prepared from different starting precursors. In the first case, Y2Ba1Cu1O5 (Y211) powder as the solid phase and the liquid phase of mixture of YBa2Cu3O7-x+BaCuO2+CuO powders were used. In the second case the solid phase was prepared from the mixture of Y2O3+BaCuO2 instead of the conventionally used Y211. The microstructure of samples was studied by polarized light microscopy and scanning electron microscope (SEM). The influence of different staring compositions on the final size of Y211 particles is shown. Also the influence of BaCuO2 concentration in the Y2O3+x·BaCuO2 (x=0.2; 0.5; 0.8; 1; 1.2; 1.5; 1.8) mixture on the Y211 size was studied.

Behavior of silver substitution in single-grain TSMG YBCO bulk superconductor

2010 ◽  
Vol 470 (2) ◽  
pp. 155-158 ◽  
Author(s):  
P. Diko ◽  
V. Antal ◽  
M. Kaňuchová ◽  
M. Jirsa ◽  
K. Jurek
Keyword(s):  
Bulk Superconductor ◽  
Ybco Bulk ◽  
Single Grain

A novel preform compaction method for fabricating high-performance Y–Ba–Cu–O single-grain bulk superconductor

2021 ◽  
Author(s):  
Guo-Zheng Li ◽  
Miao Wang
Keyword(s):  
High Performance ◽  
Sample Surface ◽  
Bulk Superconductor ◽  
Ybco Bulk ◽  
Trapped Field ◽  
Optical Micrograph ◽  
New Type ◽  
Single Grain ◽  
Grain Bulk ◽  
Compaction Method

Abstract A novel preform compaction method based on one new type of divisible mould was employed for fabricating single-grain YBCO bulk superconductor, which can complete the preform demoulding process through opening of the mould, rather than pushing the preform out in the regular mould. Thus it has natural superiority on eliminating macro-cracks, which has been proved by the sample surface morphology and the trapped field characterization. In addition, the divisible mould pressed sample exhibits higher levitation force and trapped field properties than the regular mould pressed samples, verifying the potentials of the divisible mould on improving the bulk performance. The optical micrograph results prove the superiority of the divisible mould on eliminating tiny cracks on sample surface. The processing facility and sample reliability brought by the divisible mould should also be emphasized, because the crushing and re-pressing of preform when it presents visible cracks can be omitted and the failed samples with surface cracks will no longer appear. Consequently, the experimental efficiency and stability are both enhanced.

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