Varadaraju, U. V. ; Subba Rao, G. V. ; Chandrasekaran, K. D. ; Baradarajan, A. ; Krishnaiah, K. ; Agarwala, Mukesh ; Achutharaman, V. S. ; Venugopal, P. ; Padmanabhan, K. A. ; Vaidyanathan, L. S. ; Rangarajan, G. (1989) Oxygen-enrichment of YBa2Cu3O7-δ using the fluidization technique Bulletin of Materials Science, 12 (1). pp. 63-80. ISSN 0250-4707
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Official URL: http://www.ias.ac.in/j_archive/bms/12/1/63-80/view...
Related URL: http://dx.doi.org/10.1007/BF02744597
Abstract
The oxygen-deficient phase of the high Tc 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.
Item Type: | Article |
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Source: | Copyright of this article belongs to Indian Academy of Sciences. |
Keywords: | High Temperature Superconductivity; YBa2Cu3O7; Fluidization |
ID Code: | 52583 |
Deposited On: | 23 Nov 2011 05:24 |
Last Modified: | 18 May 2016 06:04 |
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