The influence of precursor powder on the microstructure and properties of Bi-2212 blocks
- 1. CEPEL - Electric Power Research Center, P.O. Box 68007, 21944-970 Rio de Janeiro, RJ (Brazil)
- 2. PUC-Rio - Pontifical Catholic University, Department of Materials Science and Metallurgy, P.O. Box 38008, 22453-900 Rio de Janeiro, RJ (Brazil)
Description
The present work reports our investigations on the partial melt processing of bulk Bi-2212. Commercial and homemade precursor powders with different nominal compositions were melt-processed into silver molds. Samples were analyzed by XRD, SEM/EDS and DC critical current measurements. The main secondary phases forming upon Bi-2212 peritectic decomposition were 14:24 and 91150, besides 2201, which crystallizes from the liquid. The superconducting properties depended mainly on the precursor and on the maximum processing temperature. The commercial precursors provided the best results. Bi-2212 blocks with Ic = 90-135 A and Jc = 900-1350 A/cm2, at 77 K, have been obtained. However, reducing the amount of coarse secondary phases and optimizing the 2212 oxygen content may enhance the performance of bulk Bi-2212
Availability note (English)
Available from http://dx.doi.org/10.1016/j.physc.2007.04.022Additional details
Identifiers
- DOI
- 10.1016/j.physc.2007.04.022;
- PII
- S0921-4534(07)00552-7;
Publishing Information
- Journal Title
- Physica. C, Superconductivity
- Journal Volume
- 460-462
- Journal Page Range
- p. 1349-1350
- ISSN
- 0921-4534
- CODEN
- PHYCE6
Conference
- Title
- 8. international conference on materials and mechanisms of superconductivity and high temperature superconductors
- Acronym
- M2S-HTSC VIII
- Dates
- 9-14 Jul 2006
- Place
- Dresden (Germany)
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39073372
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; COPPER COMPOUNDS; CRITICAL CURRENT; CURRENT DENSITY; MICROSTRUCTURE; OPTIMIZATION; OXYGEN COMPOUNDS; POWDERS; PRECURSOR; PROCESSING; SCANNING ELECTRON MICROSCOPY; STRONTIUM COMPOUNDS; TEMPERATURE RANGE 0065-0273 K; X-RAY DIFFRACTION
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; COHERENT SCATTERING; CURRENTS; DIFFRACTION; ELECTRIC CURRENTS; ELECTRON MICROSCOPY; MICROSCOPY; SCATTERING; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Copyright
- Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.