Oxygen-enrichment of YBa2Cu3 YBa2Cu3O7-δ using the fluidization techniqueusing the fluidization technique
U.V. Varadaraju,G.V. Subba Rao,K D Chandrasekaran,A Baradarajan,K. Krishnaiah,Mukesh Agarwala,V. S. Achutharaman,P. Venugopal,K. A. Padmanabhan,L. S. Vaidyanathan,G. Rangarajan +10 more
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In this paper, the oxygen-deficient phase of the highTc superconductor, YBa2Cu3O7, was enriched using the fluidization technique to give good superconducting properties.Abstract:
The oxygen-deficient phase of the highTc superconductor, YBa2Cu3O7, was oxygen-enriched using the fluidization technique to give good superconducting properties. The normal method of oxygen treatment at 900°C for 24 h and at 600°C for 24 h has been reduced to just one treatment at 600°C for 12 h by the fluidization technique to achieve almost the same strength of superconducting signal for the YBa2Cu3O7 powder, which establishes the attractiveness of the latter route for the large-scale preparation of superconducting material. The particle sizes were in the range 0–90, 90–180 and 180–420 µm. The fluidized particles were crystalline with orthorhombic distortion.Tconset, estimated using the a.c. magnetic susceptibility method, was 91·3 K. The volume fraction of superconducting material in the product was 83·7–85·3%, one of the highest values reported so far for YBa2Cu3O7.read more
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Effect of oxide additives on the properties of high temperature superconductor, YBa2Cu3O7
TL;DR: The effect of oxide additives on sintering and superconducting properties of YBa2Cu3O7 was studied in this article, and the best results were obtained with Bi2O3, SiO2 and Y2O 3.
References
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Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressure
Maw-Kuen Wu,J. R. Ashburn,C. J. Torng,Pei-Herng Hor,R. L. Meng,Li Gao,Z. J. Huang,Yongmei Wang,Ching-Wu Chu +8 more
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Robert J. Cava,Bertram Batlogg,R. B. van Dover,Donald W. Murphy,Steven A. Sunshine,Theo Siegrist,J. P. Remeika,Edward A. Rietman,S. M. Zahurak,G. P. Espinosa +9 more
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Journal ArticleDOI
Oxygen ordering and the orthorhombic-to-tetragonal phase transition in YBa2Cu
James D. Jorgensen,M. A. Beno,D. G. Hinks,L. Soderholm,K.J. Volin,R. L. Hitterman,J. D. Grace,Ivan K. Schuller,C. U. Segre,K. Zhang,M. S. Kleefisch +10 more
TL;DR: In situ neutron powder diffraction measurements show that the orthorhombic-to-tetragonal phase transition in YBa/sub 2/Cu/sub 3/O/sub 7-//sub x/ is an order-disorder transition in which the disordering of oxygen atoms into a normally vacant site destroys the one-dimensional Cu-O chains present in the room-temperature orthorHombic structure.
Gas fluidization technology
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Encyclopedia of Chemical Processing and Design
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