Abstract
In this paper, the possibility of critical temperature increasing of superconducting precursor Tс and the current bearing capacity in samples of Bi-Pb-Sr-Ca-Cu-O superconducting system fabricated using hot shock wave consolidation (HSWC) technology and investigated by the vibrating torsional magnetometry method, was studied. The advantage of HSWC technology over the traditional technologies of superconducting composites synthesis is that the high-density materials are made from the Bi-Pb-Sr-Ca-Cu-O superconducting system. After the action of explosive wave the superconductivity is retained. After the explosion a pronounced texture is formed indicating the creation of efficient pinning centers and thus, the increase of current-carrying ability of the obtained material. The critical temperature of potential superconducting precursor Tc of transition to superconducting state increased from Tc=107K for starting sample to Tc=138K, using the HSWC technology for synthesis of samples in range of pressures from P=5GPa up to P=12GPa.
Highlights
After the epoch-making discovery of high-temperature superconductors (HTSC) great efforts were devoted worldwide to the further increase of the critical temperature of superconducting transition Тс with aim to reach room temperatures
We present further the experimental results of study of the HTSC samples of Bi-Pb-Sr-Ca-Cu-O system fabricated by the hot shock wave consolidation (HSWC) technology showing the possibility to increase significantly their critical temperature Тc
EXPERIMENTAL RESULTS AND DISCUSSION The novelty of the proposed HSWC technology is in the consolidation of bulk samples of high density from superconducting powders of mixtures with the dimensions of the order of ~2-5mm, L~50-70mm
Summary
After the epoch-making discovery of high-temperature superconductors (HTSC) great efforts were devoted worldwide to the further increase of the critical temperature of superconducting transition Тс with aim to reach room temperatures. We present further the experimental results of study of the HTSC samples of Bi-Pb-Sr-Ca-Cu-O system fabricated by the HSWC technology showing the possibility to increase significantly their critical temperature Тc.
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