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Progress in research and development for high temperature and low temperature superconductors

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1 Author(s)
Chernoplekov, N.A. ; I.V. Kurchatov Inst. of Atomic Energy, Moscow, USSR

It is noted that the most significant result in the development of Nb-Ti conductors in the last few years is the attainment of the critical current density Jc(5 T, 4.2 K)=(3-4)×109 A/m2 in industrial lots of wires. This value is close to the upper limit for traditional thermomechanical treatments with low-temperature annealing. New results on Nb3Sn and other A-15 compounds have been obtained using methods that overcome some weak points of the bronze process. However, the bronze technology will remain the most suitable for large-scale production. Active work on the first stage of HTSC (high-temperature superconductor) development has produced some promising results. Critical current density values at 4.2 K and 77.3 K have been obtained in bulk samples such that practical applications of HTSC in high current technologies can be seriously considered

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Magnetics, IEEE Transactions on  (Volume:28 ,  Issue: 1 )