Fabrication and Superconducting Properties of High Tc Oxide Wire

1987 ◽  
Vol 99 ◽  
Author(s):  
N. Sadakata ◽  
Y. Ikeno ◽  
M. Nakagawa ◽  
K. Gotoh ◽  
O. Kohno
Keyword(s):  
Critical Current Density ◽  
Liquid Nitrogen ◽  
Liquid Nitrogen Temperature ◽  
Intrinsic Properties ◽  
Superconducting Properties ◽  
Intensive Study ◽  
High Tc ◽  
Fabrication Procedure ◽  
Paper Fabrication ◽  
Critical Current Density Jc

Since the discovery of high Tc superconducting oxide such as Ln-Ba-Cu-O system which shows superconductivity above liquid nitrogen temperature, intensive study has been carried out to investigate its intrinsic properties[l-4]. Superconducting wire which operates in liquid nitrogen is one of the emerging products among application, however, there are many factors to be investigated for practical use. Critical current density, Jc, is one of the most important characteristics of superconductor, although, only few report describing Jc measurement ever published[5]. In this paper, fabrication procedure of silver sheathed Y-Ba-Cu-O wire by powder metallurgical technique and its superconducting properties have been reported. Other factors which may influence superconductivity such as microstructure of the oxide, configuration of wires, etc. are also discussed.

Preparation of Y-BA-CU Oxide Superconducting Composite Tapes by a Diffusion Process

1987 ◽  
Vol 99 ◽  
Author(s):  
K. Tachikawa ◽  
M. Sugimoto ◽  
N. Sadakata ◽  
O. Kohno
Keyword(s):  
Diffusion Process ◽  
Critical Current ◽  
Liquid Nitrogen ◽  
Liquid Nitrogen Temperature ◽  
Oxide Compound ◽  
High Tc ◽  
Powder Metallurgical Process ◽  
Current Densities ◽  
Wire Fabrication ◽  
Made In

Since discovery of the Y-Ba-Cu oxide compound showing superconductivity above liquid nitrogen temperature, intensive study has been under way to clarify nature of the high Tc oxides[l-4]. Much efforts were also made in the field of superconductor applications. A number of studies have been carried out by a powder metallurgical process of Y-Ba-Cu oxide compound wires, although, obtained critical current densities were still low at liquid nitrogen temperature[5–6]. Other techniques for wire fabrication is also being attempted[7–9]. In this study, Y-Ba-Cu oxide superconducting composite tapes were prepared by a diffusion process, which is one of the promising methods to obtain a high critical current density.

Relation of Constituents with Superconducting Characteristics in Low-Temperature-Preheated YBCO Ceramics

1992 ◽  
Vol 275 ◽  
Author(s):  
Junya Nishino ◽  
Hiroaki Nishikawa ◽  
Muneo Ayabe ◽  
Yuji Ikegami
Keyword(s):  
Critical Temperature ◽  
Low Temperature ◽  
Critical Current Density ◽  
Superconducting Properties ◽  
Ybco Bulk ◽  
Disordered Phase ◽  
Yttrium Barium ◽  
Ybco Ceramics ◽  
Critical Current Density Jc ◽  
Critical Temperature Tc

ABSTRACTYBCO bulk ceramics pre-heated at low temperature before sintering were studied on the structure and superconducting properties mainly by varying the concentration of Ba/Y ratio.At 15.8–16.2wt% of the oxygen content Oc calcurated from the compositions of yttrium, barium and copper on the assumption that the valence of copper is 2, (123) phase is main and critical temperature(Tc) and critical current density(Jc) reach to 88–90K and about 103A/cm2, respectively.It is presumed that there is a possibility of the exixtence of oxygen deficient and disordered phase in addition to (123) and (211) phases and BaCuO2.

BISMUTH PARTIAL SUBSTITUTION EFFECT ON PROPERTIES OF THE Bi2Sr2Ca2Cu3OZ SYSTEM

2002 ◽  
Vol 16 (20) ◽  
pp. 769-774
Author(s):  
S. SIMON ◽  
R. V. F. TURCU ◽  
M. POP ◽  
Gh. BORODI
Keyword(s):  
Heat Treatment ◽  
Diffraction Analysis ◽  
Liquid Nitrogen ◽  
Substitution Effect ◽  
Liquid Nitrogen Temperature ◽  
Partial Substitution ◽  
Superconducting Properties ◽  
X Ray Diffraction ◽  
Static Susceptibility ◽  
X Ray

The effect of bismuth partial substitution by lead, cadmium or tin on the properties of the polycrystalline systems Bi 2-x M x Sr 2 Ca 2 Cu 3 O z (M = Pb, Cd or Sn) was investigated. The samples were obtained from amorphous precursors by heat treatment applied in several stages. X-ray diffraction analysis and static susceptibility measurements were carried out in order to characterize the structure and to check the superconducting properties of the investigated samples. Superconducting behavior above liquid nitrogen temperature was evidenced only for the partial substitution of Bi with x = 0.2 Pb and x = 0.1 Sn.

scholarly journals Effect of Pressure on the Superconducting Properties of Tl2Ba2Ca2Cu3O9-δ

Crystals ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 4
Author(s):  
Anota Ijaduola ◽  
Rai Shipra ◽  
Athena Sefat
Keyword(s):  
Transition Temperature ◽  
Hydrostatic Pressure ◽  
Critical Current Density ◽  
Current Density ◽  
Magnetic Hysteresis ◽  
Superconducting Transition ◽  
Superconducting Properties ◽  
Piston Cylinder ◽  
State Formula ◽  
Critical Current Density Jc

This study investigated the application of pressure on the superconducting properties of a thallium-based cuprate, namely Tl2Ba2Ca2Cu3O9-δ (Tl-2223). The superconducting transition temperature (Tc) and the critical current density (Jc) were studied by applying ~1 GPa of pressure. This hydrostatic pressure was applied in a piston-cylinder-cell (PCC), using Pb as a manometer and Daphne 7373 oil as the pressure transmitting medium. For estimating the Jc, we used Bean’s critical state formula on the magnetic hysteresis curves at 10 K and 20 K. Both the Tc and Jc improved with pressure. The Jc values increased at both temperatures and the Tc value increased by 4 K with a pressure of 0.8 GPa. These results clearly indicate that pressure is another tool to control properties of quantum materials.

Thermal Annealing Study of High-TC Ybacuo and Bisrcacuo Superconducting Wires

1989 ◽  
Vol 169 ◽  
Author(s):  
Y. D. Yao ◽  
J. W. Chen ◽  
Y. Y. Chen ◽  
W. S. Pern ◽  
H. A. Yong ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Thermal Annealing ◽  
Current Density ◽  
Annealing Treatment ◽  
Superconducting Properties ◽  
High Tc ◽  
Superconducting Wires ◽  
Annealing Study ◽  
Thermal Annealing Treatment

AbstractHigh‐T YBaCuO and BiSrCaCuO Superconducting wires have been fabricated by powder metallurgy technique. Copper and silver tubes were used as the external jackets. Thermal annealing treatments for all the wire‐type samples were performed between 773 K and 1223 K. Both electrical and magnetization studies show that the superconducting properties can be improved after properly thermal annealing these samples with silver jacket. Our experimental results show that proper thermal annealing treatment can enhance the intragrain critical current density more than 100 times; however, the intergrain critical current density improves only a few times.

Growth of and Critical Current Density of TL2BA2CACU2O8 Superconducting Single Crystals

1992 ◽  
Vol 275 ◽  
Author(s):  
H. M. Duan ◽  
T. S. Kaplan ◽  
B. Dlugosch ◽  
A. M. Hermann
Keyword(s):  
Critical Current Density ◽  
Single Crystals ◽  
Critical Current ◽  
Liquid Nitrogen ◽  
Current Density ◽  
Liquid Nitrogen Temperature ◽  
Critical Currents ◽  
Different Temperatures

ABSTRACTLarge single crystals of Tl2Ba2CaCu2O8 superconductors were grown by a two step self-flux process. Crystals are plate-like. The in-plane crystal sizes are as large as 5mmX5mm and the thickness range from 0.01mm to 0.8mm. The critical currents were extracted from I-V curves measured at different temperatures. jc was about 2.4×104 A/cm2 at liquid nitrogen temperature.

The Effects of Nanoparticle Addition in Bi-2212 Superconductors

2014 ◽  
Vol 69 (2) ◽  
Author(s):  
M. A. Suazlina ◽  
S. Y. S. Yusainee ◽  
H. Azhan ◽  
R. Abd-Shukor ◽  
R. M. Mustaqim
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Density Measurement ◽  
Solid State Reaction Method ◽  
Crystallographic Structure ◽  
Superconducting Properties ◽  
X Ray Diffraction ◽  
Oxide Powders ◽  
Critical Current Density Jc

The effect of Y2O3 nanoparticle addition on the superconducting properties of Bi1.6Pb0.4Sr 2CaCu 2Oy have been investigated. The samples were prepared using high purity oxide powders via solid state reaction method. Y2O3 nanoparticle with 0.0-1.0 wt. % was systematically added to the well balanced Bi1.6Pb0.4 Sr2CaCu2Oy before sinter in order to trace the existense of nanoparticle addition in the system. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and critical current density, Jc. The current density measurement was done via four-point probe method under zero magnetic fields. The critical current density, Jc and superconductivity transition temperature, Tc for sample with addition of Y2O3 nanoparticle were found to be higher than the pure sample. The optimal addition of Y2O3 nanoparticle to the sample Bi-2212 system was found at 0.7 wt. %. The crystallographic structure of all samples was evidenced to be orthorhombic where a ≠ b ≠ c. Changes in superconducting properties of Y2O3 nanoparticle added Bi-2212 system were discussed.

Conventional and Chemical Processing of High Tc Superconductors

1988 ◽  
Vol 121 ◽  
Author(s):  
M. F. Yan ◽  
H. C. Ling ◽  
H. M. O'Bryan ◽  
P. K. Gallagher ◽  
W. W. Rhodes
Keyword(s):  
Critical Current Density ◽  
Screen Printing ◽  
Tape Casting ◽  
Microstructural Development ◽  
Chemical Processing ◽  
Superconducting Properties ◽  
High Tc Superconductors ◽  
Ceramic Powders ◽  
High Tc ◽  
Dry Pressing

ABSTRACTConventional and chemical processing of the superconducting YBa2Cu3Ox ceramic powders are reviewed. Conditions for calcination, sintering and microstructural development are shown to be important considerations for the superconducting properties of YBa2Cu3Ox ceramics. We examine different forming techniques, e.g. dry pressing, hot pressing, tape casting and screen printing, to prepare superconducting components with different sizes, shapes and configurations. We also identify and discuss problem areas related to incomplete decomposition of BaCo3 precursor; oxidation of YBa2Cu3Ox ceramics; sensitivity of the YBa2Cu3Ox phase to water; reactivity of the YBa2Cu3Ox phase with substrates and co-firing materials; low critical current density in bulk ceramics of YBa2Cu3Ox and low mechanical strength of YBa2Cu3Ox ceramics.

Operation of high-Tc SFQ devices at near liquid nitrogen temperature

1997 ◽  
Vol 280 (4) ◽  
pp. 304-310 ◽  
Author(s):  
Y.H. Kim ◽  
J.H. Kang ◽  
J.M. Lee ◽  
T.S. Hahn ◽  
S.S. Choi ◽  
...  
Keyword(s):  
Liquid Nitrogen ◽  
Liquid Nitrogen Temperature ◽  
High Tc

Effect of 120 MeV16O Ion Irradiation at Liquid Nitrogen Temperature on Superconducting Properties of Bi-Pb-Sr-Ca-Cu-O

1989 ◽  
Vol 28 (Part 2, No. 11) ◽  
pp. L1939-L1941 ◽  
Author(s):  
Akihiro Iwase ◽  
Mitsuo Watanabe ◽  
Tadao Iwata ◽  
Takeshi Nihira
Keyword(s):  
Liquid Nitrogen ◽  
Ion Irradiation ◽  
Liquid Nitrogen Temperature ◽  
Superconducting Properties
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