High Temperature Superconducting Magnetic Levitation
26 Ë 2 Superconducting materials (e.g. 20 K). The Bi-2212 wires have better transport properties than Bi-2223 at 4.2 K. First- g ...
2.3 HTS materials Ë 27 tapes is achieved by coated film conductor processing technology. REBCO-coated conductors are one of the ...
28 Ë 2 Superconducting materials rare earth elements such as cerium, samarium, neodymium, and praseodymium, superconductivity ca ...
2.4 HTS bulk materials Ë 29 Tab . 2.3: Characteristic parameters of HTSC materials [61]. Mater ials Tc (K) 휇^0 Hc1ab (T) 휇^0 Hc1 ...
30 Ë 2 Superconducting materials Electronics Technology successfully prepared large bulk HTS samples using the sinte- ring techn ...
2.4 HTS bulk materials Ë 31 current. However, for sintered YBCO HTS bulk, theJcis low due to the existence of weak links at the ...
32 Ë 2 Superconducting materials 2.4.3Developments of HTS bulk materials The rare-earth Ba-Cu-O (REBCO, RE=Y, La, Nd, Sm, Eu, Gd ...
2.4 HTS bulk materials Ë 33 Fig. 2.3:Three shapes of HTS YBCO bulks in the top view, (a) regular hexagon, (b) square and (c) cyl ...
34 Ë 2 Superconducting materials Fig. 2.4:Single- and multi-seeded melt-textured HTS YBCO bulks (Adelwitz Technologiezentrum Gmb ...
2.4 HTS bulk materials Ë 35 mini-magnet made of two YBCO samples.B 0 on top of a single sample was 12.5 T at 20 K and 9 T at 40 ...
36 Ë 2 Superconducting materials heat transfer, faster oxygenation and less microcracking, possibility of reinforcement and of i ...
2.5 Thermal properties of HTS bulk Ë 37 When a small amount of heat is put into a superconductor, some of the heat is used to in ...
38 Ë 2 Superconducting materials Fig. 2.6:Temperature dependence of the specific heatC(T) of the Bi2212, Nb 3 Sn, and MgB 2 samp ...
2.5 Thermal properties of HTS bulk Ë 39 Fig. 2.8:Variation of specific heatC(T) of GdBa 2 (Cu 1 −xMnx) 3 O 7 −훿forx⩽0.02 in the ...
40 Ë 2 Superconducting materials is approximately constant. The thermal conductivity in the superconducting state is smaller tha ...
2.5 Thermal properties of HTS bulk Ë 41 Fig. 2.9:(a) Comparison of the thermal conductivity measured within a YBCO grain and acr ...
42 Ë 2 Superconducting materials 1 × 10 −^6 to 1× 10 −^5 K.−^1 in temperatures of 40–300 K ina-bplane. The coefficient is in the ...
2.6 Mechanical properties of HTS bulk Ë 43 Eis defined by Hooke’s law,휎=E휀, where휎and휀are tensile stress and strain, respectivel ...
44 Ë 2 Superconducting materials Tab. 2.5:The mechanical properties for REBCO bulk materials. Parameters Materials Units Values ...
2.7 Trapped fluxes in HTS bulk Ë 45 conditions. In addition, other environments, such as fabrication, handling, transport, and s ...
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