Obtaining and studying the properties of high-temperature superconductors of homologous series of Bi1.7Pb0.3Sr2Ca n − 1Cu n O y (n = 4−9) under influence of solar energy

Vibrating Reed Study of Superconducting Cuprates Fabricated by Superfast Melt Quenching in a Solar Furnace

“…The location of the coils in the immediate vicinity of the sample allows the creation of a sufficiently strong alternating field on it by using a standard low-frequency generator. The alternating field h created by the Helmholtz coils can also be directed at different angles that were combined with application of solar energy and superfast quenching melt technology [1][2][3][4][5]. Amorphous precursors and their use make possible the manufacturing of high-density low porous texturized ceramics with given dimensions of grains.…”

“…From this point of view, particular interest attracts the Bi-Pb-Sr-Ca-Cu-O system, because it is characterized by high Т с =107К and the record high second critical magnetic field Н с2 ~150T. Our group has undertaken research on the possibility to increase the Т с of this system [1][2][3][4][5]. In [1][2][3]5] the melt technology for obtaining Bi-Pb-Sr-Cu-O HTSC ceramics using solar energy for melting and subsequent superfast melt quenching for increasing of internal inhomogeneities was developed, allowing the receiving of homogeneous, highquality, textured ceramic samples with controllable microstructure and pinning centers.…”

“…Our group has undertaken research on the possibility to increase the Т с of this system [1][2][3][4][5]. In [1][2][3]5] the melt technology for obtaining Bi-Pb-Sr-Cu-O HTSC ceramics using solar energy for melting and subsequent superfast melt quenching for increasing of internal inhomogeneities was developed, allowing the receiving of homogeneous, highquality, textured ceramic samples with controllable microstructure and pinning centers. In [4], Hot Shock Wave Consolidation Technology was used to produce Bi-Pb-Sr-Ca-Cu-O compositions with increased internal inhomogeneity and for studying their superconducting precursor phases by torsional magnetometry method.…”

Superconducting Precursors in Bi/Pb Multiphase Cuprates Fabricated by the Solar Technology and their Comparative Study by Torque Magnetometry Methods

“…"Bursts" can refer to homologous phases that appear in diffraction patterns as a series of reflections, or these effects refer to physical phenomena associated with electronic states caused by the action of a concentrated light flux [22]. In the subgroup of compounds 2256-2289, the phase composition was similar to the subgroup 2223-2234 [23], and for the 221920 sample it looks as shown in Figure 2. Ceramic HTSC samples had a compressive strength limit of 12-14 MPa.…”

On the Nature of Superconducting Precursors in Bi-Pb-Sr-Ca-Cu-O Compositions Fabricated by Hot Shock Wave Consolidation Technology

“…In [2], special technology was applied to synthesize HTSC samples with increased local inhomogeneities. Using recently developed solar fast alloys quenching technology (SFAQ-Т) [3], based on glass-crystal and X-ray amorphous precursors, authors synthesized samples by quenching at liquid nitrogen temperatures of melt which was produced by heating of precursors with solar radiation and obtained decompositionresistant textured superconducting systems Bi 1.7 Pb 0.3 Sr 2 Ca (n-1) Cu n O 10-y (n=2-30) with critical temperature of the superconducting transitions up to 200К [2]. To determine the critical temperature of the superconducting transition T c of these samples it was used an original vibrating torsional magnetometry method to study the torsion oscillations of samples in an applied magnetic field realized using an automated multipurpose device [4], having the sensitivity comparable with that of a SQUID magnetometer, designed at E. Andronikashvili Institute of Physics (Tbilisi, Georgia).…”