Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5

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Author:
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ISBN:
Category :
Languages : en
Pages :

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Book Description
YBCO-coated conductors will enable the development of smaller, lighter, more-efficient electric power devices that can be operated at temperatures approaching that of liquid nitrogen. The critical current density (J[sub c]) of YBCO films on flexible metallic substrates has been significantly improved by epitaxially growing the YBCO on biaxially textured template films. Inclined substrate deposition (ISD) offers the potential for rapidly producing high-quality biaxially textured buffer layers that are suitable for YBCO-coated conductors. Using the ISD method, we have grown biaxially textured MgO films at deposition rates of 20-100[angstrom]/sec. Electron microscopy of the ISD-MgO films revealed columnar grains topped off by MgO (002) planes, and X-ray pole figure analysis showed that the (002) planes are tilted with respect to the substrate normal, giving ISD-MgO films a roof-tile surface morphology. A small phi-scan full-width at half maximum of[approx]10[sup o] was observed on ISD-MgO films deposited with a substrate inclination of 55[sup o]. YBCO films were grown on ISD-MgO buffered Hastelloy substrates by pulsed laser deposition. A sample that was 0.42[micro]m x 0.45 mm x 1 cm gave a transport J[sub c] of[approx]0.34 MA/cm[sup 2] at 77 K in self-field. Details of ISD-MgO film fabrication and characterization, as well as the results of YBCO deposited on the ISD-MgO architecture, are presented.

Author:
Publisher:
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Category :
Languages : en
Pages :

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Book Description
Thin films of YBa[sub 2]Cu[sub 3]O[sub 7-x] (YBCO) were grown on MgO buffered metallic substrates by pulsed laser deposition (PLD). The MgO buffer films, which provide the initial biaxial texture, had been grown on polished Hastelloy C276 (HC) tapes using inclined substrate deposition (ISD). The ISD process is promising for the fabrication of coated superconductor wires because it produces biaxially textured template films on nontextured substrate at high deposition rates. Biaxially aligned MgO films were deposited at deposition rates of 20 to 100[angstrom]/sec. The buffer films were deposited on these template films before ablation of the YBCO films by PLD. The microstructure was studied by scanning electron microscopy and atomic force microscopy. X-ray pole figure analysis and[phi]- and[omega]-scans were used for texture characterization. Good in- and out-of-plane textures were observed on the ISD MgO films ([approx]1.5[micro]m thick). The full width at half maximums were 9.2[sup o] for the MgO (002)[phi]-scan and 5.4[sup o] for the[omega]-scan. Cube-on-cube epitaxial growth of yttria-stabilized zirconia (YSZ) and ceria (CeO[sub 2]) films on the ISD MgO films was also achieved by PLD. A superconducting critical temperature of 90 K, with a sharp transition, and transport critical current density of>2.5 x 10[sup 5] A/cm[sup 2] were obtained on a 0.5-[micro]m-thick, 0.5-cm-wide, and 1-cm-long YBCO film with MgO buffer layer at 77 K in self-field.

Author: Amit Goyal
Publisher: John Wiley & Sons
ISBN: 1118405951
Category : Technology & Engineering
Languages : en
Pages : 402

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Book Description
Included in this volume are papers on biaxial and triaxial crystallographic texturing, epitaxial growth on biaxially textured substrates, melt-processing of YBCO, and basic information about HTS materials concerning phase diagrams, measurement of physical properties, characterization, and effects of various defects including grain boundaries on supercurrent transmission. Proceedings of the symposium held at the 104th Annual Meeting of The American Ceramic Society, April 28-May1, 2002 in Missouri; Ceramic Transactions, Volume 140.

Author: A. V. Narlikar
Publisher: Oxford University Press
ISBN: 0199584117
Category : Science
Languages : en
Pages : 491

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Book Description
Unusual and unconventional features of a large variety of novel superconductors are presented and their technological potential as practical superconductors assessed.

Author: Robert Eason
Publisher: John Wiley & Sons
ISBN: 0470052112
Category : Science
Languages : en
Pages : 754

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Book Description
Edited by major contributors to the field, this text summarizes current or newly emerging pulsed laser deposition application areas. It spans the field of optical devices, electronic materials, sensors and actuators, biomaterials, and organic polymers. Every scientist, technologist and development engineer who has a need to grow and pattern, to apply and use thin film materials will regard this book as a must-have resource.

Author: M. P. Paranthaman
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 416

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Book Description
Major advances in the years leading up to publication of this 2002 book in high-temperature superconductor (HTS) research resulted in the increased use of HTS materials in commercial and precommercial applications. These materials have in common the complexity of their multicomponent chemistry. Consequently, it is not surprising that many aspects of the interplay among microscopic structure, macroscopic properties and processing are still not fully understood. This book offers a comprehensive status review of high-temperature superconductors from the near-term commercialization of the first-generation BSCCO tapes, to the continuing advancement of the second-generation YBCO-coated conductors, to the development of the new MgB2 material. Fundamental material properties studies, new growth methods, device and materials integration research, and developments in designing and growing new materials, all involving epitaxial superconducting thin films, are featured.

Author: Winnie Wong-Ng
Publisher: John Wiley & Sons
ISBN: 1118408489
Category : Technology & Engineering
Languages : en
Pages : 208

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Book Description
The number of ceramic materials with a perovskite type structure islarge and of considerable technological importance due to theirrich crystal chemistry and structure-property relationships.Applications include multilayer capacitators, piezoelectrictransducers, PTC thermistors, electrooptical modulators, opticalswitches, dielectric resonators, thick film resistors, electronicsensors, electrorestrictive actuators, magnetic bubble memorydevices, laser host materials, ferromagnetic materials, refractoryelectrodes, second harmonic generators, batteries, ceramicelectrodes, thermoelectric devices, and high temperaturesuperconductors. This volume contains papers on the research and development of newperovskite materials for various applications including doping ofexisting perovskite materials as well as processing for improvedproperties.

Author: David A. Cardwell
Publisher: CRC Press
ISBN: 9780750304320
Category : Science
Languages : en
Pages : 1120

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Book Description
With the advent of High Temperature Superconductivity and the increasing reliability of fabrication techniques, superconductor technology has moved firmly into the mainstream of academic and industrial research. There is currently no single source of practical information giving guidance on which technique to use for any particular category of superconductor. An increasing number of materials scientists and electrical engineers require easy access to practical information, sensible advice and guidance on 'best-practice' and reliable, proven fabrication and characterisation techniques.The Handbook will be the definitive collection of material describing techniques for the fabrication and analysis of superconducting materials. In addition to the descriptions of techniques, authoritative discussions written by leading researchers will give guidance on the most appropriate technique for a particular situation.Characterisation and measurement techniques will form an important part of the Handbook, providing researchers with a standard reference for experimental techniques. The tutorial style description of these techniques makes the Handbook particularly suitable for use by graduate students.The Handbook will be supported by a comprehensive web site which will be updated with new data as it emerges.The Handbook has six main sections: -- Fundamentals of Superconductivity - characteristic properties, elementary theory, critical current of type II superconductors-- Processing - bulk materials, wires and tapes, thick and think films, contact techniques-- Characterisation Techniques - structure/microstructure, measurement and interpretation of electromagnetic properties,measurement of physics properties-- Materials - characteristic properties of low and high Tc materials-- Applications - high current applications, trapped flux devices, high frequency devices, josephson junction devic

Author: Paolo Mele
Publisher: Springer Nature
ISBN: 3030233030
Category : Technology & Engineering
Languages : en
Pages : 369

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Book Description
This book provides readers with a comprehensive overview of the science of superconducting materials. It serves as a fundamental information source on the actual techniques and methodologies involved in superconducting materials growth, characterization and processing. This book includes coverage of several categories of medium and high-temperature superconducting materials: cuprate oxides, borides, and iron-based chalcogenides and pnictides. Provides a single-source reference on superconducting materials growth, characterization and processing; Bridges the gap between materials science and applications of superconductors; Discusses several categories of superconducting materials such as cuprate oxides, borides, and iron-based chalcogenides and pnictides; Covers synthesis, characterization, and processing of superconducting materials, as well as the nanoengineering approach to tailor the properties of the used materials at the nanoscale level.