Critical Currents in Superconductors for Practical Applications : Proceedings of the International Workshop Xi'an, China 6-8 March, 1997

by Zhou, L.

• ISBN13: 9789810233136
• ISBN10: 9810233132
• Format: Hardcover
• Copyright: 1998-03-01
• Publisher: WORLD SCIENTIFIC PUB CO INC

Summary

Contains the proceedings of the International Workshop on Critical Currents in Superconductors for Practical Applications held in Xi'an, China on March 6-8 1997.

Table of Contents

Workshop Organizing Committees
Foreword
Properties and Microstructure of PMP-Processed YBCO	p. 3
A Novel Method For Processing High T[subscript c] Superconducting Current Leads	p. 9
Irradiation Effects on Flux Pinning in High Temperature Superconductors	p. 15
Multifilamentary Bi(2223) Tapes: Phase Formation, Current Distribution and AC Losses	p. 21
AC Losses in Continuously Processed Bi:2223/Ag Multifilamentary Strand - Eddy-Current-, and Creep-Modified M-H Loops	p. 28
Supercurrent Conduction Mechanisms in BSCCO-2223 Tapes	p. 32
Critical Current Density and Pinning Potential in Bi-2223 Superconductor	p. 40
Magnetic Field Dependence of The Critical Currents of BSCCO Multilayers	p. 46
Improvement of Critical Current Densities and Flux Pinning of Bi-(Pb)-Sr-Ca-Cu-O Superconductors	p. 52
Formation Mechanism of Textured Bi-2223 Phase in Ag-Clad Tapes	p. 58
Superconductors of Various Shape in Transverse and Longitudinal Magnetic Field	p. 64
Effect of Nd422 Addition on Flux Pinning in Melt Processed Nd-Ba-Cu-O	p. 70
Magnetic Properties and Flux Pinning in NdBaCuO Single Crystals	p. 76
Critical Current Density and Irreversibility Line Anisotropy Due to Twin Planes in YBaCuO Studied by Transport and Magnetic Measurements	p. 82
Temperature Dependent Levitation Force and Trapped Field Measurements on YBCO Melt Textured Material	p. 88
Fabrication and Properties of High-J[subscript c], Biaxially Aligned YBa[subscript 2]Cu[subscript 3]O[subscript 7-[delta]] Thick Films on Metallic Tape Substrates	p. 94
Observation of Dynamic Interaction Between Vortices and Pinning Centers by Lorenz Microscopy	p. 100
The Study of Sputtering YBCO Epitaxial Films	p. 104
Present Status of Research and Development on HTSC in China	p. 110
Transport Properties of Copper Oxide Superconductors Prepared by a Cul-Based Method	p. 119
Effect of Ambient Atmosphere on Partial-Melting of Long Y123 Superconducting Filament by Solution Spinning	p. 123
Preparation of YBCO Superconductors Induced by Seeds	p. 127
Nucleation and Degree of Undercooling of Bulk Superconductor Y[subscript 1]Ba[subscript 2]Cu[subscript 3]O[subscript 7-x] Prepared by MTG	p. 131
An Experimental Study on The Critical Current Measurement and Stability For High-T[subscript c] Superconducting Tapes Controlled by Microcomputer	p. 135
Fabrication and Structure of NdBaCuO Single Crystal	p. 139
Kinetic Study of The Formation Sm-123 Phase	p. 143
Effect of Various Mechanical Deformations on The Properties of Silver-Clad Bi2223 Superconductors	p. 147
History Effect of Critical Current Density in Pit-Processed Bi2223/Ag Tapes	p. 151
Long Lengths of Silver-Sheathed Bi2223 High Temperature Superconducting Tapes	p. 155
Direct Evidence For Growth From Textured Bi[subscript 2]Sr[subscript 2]Ca[subscript 1]Cu[subscript 2]O[subscript x] to Textured (Bi,Pb)[subscript 2]Sr[subscript 2]Ca[subscript 2]Cu[subscript 3]O[subscript x]	p. 159
Study on The Silver-Cladding Hg-System Superconductors and Their Properties	p. 163
High Field Magnetization Properties of Melt-Textured YBa[subscript 2]Cu[subscript 3]O[subscript 7] Bulk Using a 30 T VSM Magnetometer	p. 169
Effects of Sm211 Additions on The Magnetic Properties of MTG Y123	p. 173
S-N Transition at High Transport Current of Melt Textured YBCO at 77 K	p. 177
AC Losses in YBa[subscript 2]Cu[subscript 3]O[subscript y] and Y[subscript 1-x]M[subscript x]Ba[subscript 2]Cu[subscript 3]O[subscript y] Superconductors	p. 181
Isothermal Texturing of (RE)BCO Ceramics Using Constitutional Gradients	p. 185
Pinning Properties of LRE123 (LRE:Nd,Sm) as a Function of Oxygen Deficiency	p. 189
Shielding Current Characteristics Under AC Applied Magnetic Field in Cylindrical Bulk Superconductors	p. 193
A New Bolometric Method to Measure AC Losses in Short HTS Tapes	p. 197
Pulsed Current and High Voltage Measurements on Sintered and Textured Ceramics BiPbSrCaCuO Superconductors	p. 201
Self-Field AC Losses in Long Bi-2223/Ag Multifilamentary Tapes at Power Frequencies	p. 205
Magnetic Field Property of a Bi-2223/Ag HTS Coil	p. 209
Test of Bi(Pb)-2223/Ag Double-Pancake Coil Made by WandR Method	p. 213
Fabrication and Microstructure of Bi(2223) Multi-Filamentary Tapes With Low AC Losses	p. 217
The Influence of Rolling Process on The Property of Ag-Clad Bi-2223 Tapes	p. 221
Scaling of J[subscript c]-B Curves and Pinning Potentials in High-J[subscript c] BSCCO/Ag Wires	p. 225
Current Distributions in Multi-Filamentary HTS Conductors	p. 229
Fabrication of Silver-Sheathed Bi-2223 Tapes Using Powders Produced by Modified Co-Precipitation Process	p. 233
Fabrication and Characterization of Screen-Printed Ag-Bi2223 Tapes	p. 237
Influence of B[subscript 2]O[subscript 3] Doping on The Superconductivity of (Bi,Pb)[subscript 2]Sr[subscript 2]Ca[subscript 2]Cu[subscript 3]O[subscript x] Silver-Sheathed Tapes	p. 241
Flux Creep and Flux Flow For Circulating Current in Bi(2212) and Bi(2223) Cylindrical Bulk Superconductors	p. 245
Dependence of the Pass Reduction on the Volume Fraction of Bi2223 Phase in Cold-Rolled Bi-2223/Ag Tapes	p. 249
Effects of Fluorine Substitution in T1(1223) Tapes	p. 253
Preparation of T1-1223/Ag Tapes	p. 257
Microstructure and Properties of MOCVD-YBCO/Ag Superconducting Tapes	p. 261
Critical Currents in Neutron Irradiated Bi-2223 Tapes	p. 269
Microstructure and Critical Currents in Bi2223/Ag Tapes	p. 273
Critical Current Properties of Bi(2223)/Ag Tape	p. 277
Critical Current Density For Bi[subscript 2]Sr[subscript 2]Ca[subscript 2]Cu[subscript 3]O[subscript x]/Ag Tapes Prepared Using An Isothermal Partial Melting Method	p. 281
Enhancement in Critical Current Density of High-T[subscript c] Superconductor Bi[subscript 2]Sr[subscript 2]CaCu[subscript 2]O[subscript x] by Particle-Beam Irradiation	p. 285
Flux Pinning By Columnar Defects In Epitaxial Bi[subscript 2]Sr[subscript 2]CaCu[subscript 2]O[subscript 8]- and Bi[subscript 2]Sr[subscript 2]Ca[subscript 2]Cu[subscript 3]O[subscript 10]- Thin Films	p. 289
Influence of Intrinsic Factors and Radiation Defects on Flux Pinning in HTSC	p. 293
Magnetic Field Effect on Critical Current of Ceramic High Temperature Superconductors	p. 297
The Relation Between the J[subscript c] and the Structure of Superconductor	p. 301
Enhancement of J[subscript c] In Er-Doped and Gd-Doped PMP YBCO	p. 305
Thermal Creep Rate Control In Melt Textured YBCO by Means of Proton and Heavy Ion Irradiation	p. 309
Kinetics of YBa[subscript 2]Cu[subscript 3]O[subscript x] Formation and Crystal Defects in PMP-Processed Superconductor	p. 313
High-Resolution Magneto-Optical Imaging of Critical Currents in YBCO Thin Films	p. 319
Irreversible Properties of Oxygen Deficient YBa[subscript 2]Cu[subscript 3]O[subscript x] Single Crystals	p. 325
Study on Stress-Field Pinning in (Eu,Y)-123 Superconductors	p. 329
Longitudinal and Hall Resistivities of YBa[subscript 2]Cu[subscript 3]O[subscript x] Thin Films in High Magnetic Fields	p. 333
Pinning Potentials from Magnetic Relaxation Measurements on Ring Patterned YBaCuO Films Using a Squid	p. 337
Flux Behavior in Nd[subscript 1+x]Ba[subscript 2-x]Cu[subscript 3]O[subscript 7-y] Single Crystal in External Magnetic Fields up to 2.5 T	p. 341
Direct Observation of Flux Dynamics in Oxygen Controlled Melt Growth Processed NdBCO Superconductors using the Magneto-Optical Technique	p. 345
Vortex Behavior and Irreversible Magnetization For The In-Plane Magnetic Field in Bi[subscript 2]Sr[subscript 2]CaCu[subscript 2]O[subscript 8+[delta]] Single Crystal	p. 349
Numerical Simulation Of Fluxoid Dynamics In High-T[subscript c] Superconductor Bi[subscript 2]Sr[subscript 2]Ca[subscript 2]Cu[subscript 3]O[subscript 9+x]	p. 353
I-V Measurements in Bi:2212 Film in Magnetic Fields: Scaling Behavior	p. 357
The Pinning Characteristics of High-J[subscript c] Bi(2223)/Ag Tapes	p. 361
Development of 3-Dimensional Simulation Code For Fluxoid Dynamics of Type II Superconductor	p. 365
Transient Current Behavior in Bi Superconducting Ring during Shielding Type Fault Current Limiter Operation	p. 371
Vehicle Design and Results for HTS Maglev Model	p. 375
Principle of a DC Battery Sourced Voltage Generator Designed with a HTS Inductor	p. 379
Magneto-Thermal Stability of HTSC Permanent Magnet	p. 383
Generation of Electromagnetic Pulses by Multilayered Superconductors	p. 387
Study of Ultrafine Muitifilamentary NbTi Wires for AC Use	p. 393
Characteristics of Ultrafine Multifilamentary NbTi Superconducting Wires with Island-Type Artificial Pins for Low Field Applications	p. 397
Study of Superconductor Forming by Niobium And Titanium Diffusion	p. 401
The Study on the Preparation of Biaxially-Textured Ag Substrate for Deposition of Oriented YBCO Thin Films	p. 407
Magnetisation of YBCO Thin Films	p. 411
Critical Current Modulation of High-T[subscript c] YBCO Thin Films by Quasiparticle Injection	p. 415
Step-Like Growth and Characteristics Of Bi[subscript 2]Sr[subscript 2]CaCu[subscript 2]O[subscript 8] Films on Off-C Axis Oriented SrTiO[subscript 3]	p. 419
Author Index	p. 423
List of Participants	p. 431
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