Critical current in Ag/BPSCCO tapes using low purity materials
Description
Silver-clad Bisub(1.7)Pbsub(0.4)Srsub(1.8)Ca2Cusub(3.5)Ox (BPSCCO) tapes have been fabricated using low purity (98-99%) starting materials and following the powder-in-tube technique. Maximum Jc values of 6.14x103 A.cm-2 at 77K and 1.4x105 A.cm-2 at 4.2 K have been obtained in tapes subjected to the process of intermediate rolling and sintering. The bulk superconducting material used for the tape-fabrication contains both 2223 and 2212 phases in the ratio 60:40. A pure phase material and the optimization of the sintering parameters are expected to yield much higher Jc values at 77 K. It is possible that the copper-rich phase(s) and/or a small amount of iron impurity (60 ppm) present in CuO might be acting as flux pinning sites and could be responsible for high Jc values. (author). 11 refs., 5 figs
Additional details
Publishing Information
- Journal Title
- Pramana
- Journal Volume
- 38
- Journal Issue
- 2
- Journal Page Range
- p. 179-188.
- ISSN
- 0304-4289
- CODEN
- PRAMCI
INIS
- Country of Publication
- India
- Country of Input or Organization
- India
- INIS RN
- 24009646
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- BISMUTH OXIDES; CALCIUM OXIDES; COPPER; COPPER OXIDES; CRITICAL CURRENT; CURRENT DENSITY; FOILS; GRAIN ORIENTATION; HIGH-TC SUPERCONDUCTORS; IMPURITIES; IRON; LEAD OXIDES; SCANNING ELECTRON MICROSCOPY; SILVER; SINTERING; STRONTIUM OXIDES; THICKNESS; X-RAY DIFFRACTION
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; COPPER COMPOUNDS; CRYSTAL STRUCTURE; CURRENTS; DIFFRACTION; DIMENSIONS; ELECTRIC CURRENTS; ELECTRON MICROSCOPY; ELEMENTS; FABRICATION; LEAD COMPOUNDS; METALS; MICROSCOPY; MICROSTRUCTURE; ORIENTATION; OXIDES; OXYGEN COMPOUNDS; SCATTERING; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS