Isbn: 9781402081170 - second-generation hts conductors (15 resultados)

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Condición: Sehr gut. Zustand: Sehr gut | Seiten: 368 | Sprache: Englisch | Produktart: Bücher | It is likely that the variation in J with grain boundary misorientation is similar in all c high-T superconductors. Hence,thelow J observedinrandomlyorientedpolycr- c c tallineHTScanbeunderstoodonthebasisthatthepopulationoflowangleboundaries issmallandthatfrequenthighangleboundariesimpedelong-rangecurrent?ow. - ingconventionalprocessingtechniques,threeHTSmaterialsweresuccessfullyfab- catedinpolycrystallineformwithmodestJ ¿s. ThesearetheBi-2223powder-in-tube c conductors,theTl-1223spray-pyrolyzed?lmsandtheBi-2212melt-processedthick ?lms. Thesethreetypesofconductorscomprisedthe First-GenerationHTScond- torsorwires.…

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Buch. Condición: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Thediscoveryofhightemperaturesuperconductors(HTS)in 1986bytwoIBM scientists led to an unprecedented explosion of research and development efforts world-wide because of the signi cant potential for practical applications offered by these materials. However, the early euphoria created by the exciting prospects was dampenedby the dauntingtask of fabricating these materials into useful forms with acceptablesuperconductingproperties. Progresstowardsthisgoalhasbeen hindered by many intrinsic materials problems, such as weak-links, ux-creep, and poor - chanicalproperties. TheearlieststudiesofcriticalcurrentdensityJ inHTSmaterialsrevealedthatfor c apolycrystallinematerialcontainingadistributionofgrainboundariesismuchlower than that for a single crystal. High angle grain boundariesact as Josephson coupled weak-links leading to a signi cant eld-dependent suppression of the supercurrent acrosstheboundary. Forcleanstoichiometricboundaries,thegrainboundarycritical currentdensity dependsprimarilyonthe grainboundarymisorientation. The dep- denceof J (gb)onmisorientationanglehasbeendeterminedYBa O Cu (YBCO) c 2 3 7 in boundary types which can be formed in epitaxial lms on bicrystal substrates. Theseinclude[001]tilt,[100]tilt,and[100]twistboundaries. Ineachcasehighangle boundarieswerefoundtobeweak-linked. Theseexperimentshavealsobeenextended to arti cially fabricated [001] tilt bicrystals in Tl Ba CaCu O,Tl Ba Ca Cu O , 2 2 2 8 2 2 2 3 x TlBa Ca Cu O (Tl-1223) and Nd Ce CuO . In each case it was found that, 2 2 3 x 1. 85 0. 15 4 as in YBCO, J depends strongly on grain boundary misorientation angle. Data on c currenttransmissionacrossarti ciallyfabricatedgrainboundariesinBi-2212also- dicate that most large angle [001] tilt and [001] twist boundaries are weak links. It is likely that the variation in J with grain boundary misorientation is similar in all c high-T superconductors. Hence,thelow J observedinrandomlyorientedpolycr- c c tallineHTScanbeunderstoodonthebasisthatthepopulationoflowangleboundaries issmallandthatfrequenthighangleboundariesimpedelong-rangecurrent ow. - ingconventionalprocessingtechniques,threeHTSmaterialsweresuccessfullyfab- catedinpolycrystallineformwithmodestJ s. ThesearetheBi-2223powder-in-tube c conductors,theTl-1223spray-pyrolyzed lmsandtheBi-2212melt-processedthick lms. Thesethreetypesofconductorscomprisedthe First-GenerationHTScond- torsorwires. 368 pp. Englisch.…

Gebunden. Condición: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Discusses the three methods to fabricate biaxially textured substratesIncludes chapters on various methods of HTS deposition Includes detailed chapters on other HTS materials such as the various Tl-based and Hg-based conductorsMetho.…

Buch. Condición: Neu. Second-Generation HTS Conductors | Amit Goyal | Buch | Einband - fest (Hardcover) | Englisch | 2004 | Springer US | EAN 9781402081170 | Verantwortliche Person für die EU: Springer Netherlands, Haberstr. 7, 69126 Heidelberg, buchhandel-buch[at]springer[dot]com | Anbieter: preigu Print on Demand.…

Buch. Condición: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Thediscoveryofhightemperaturesuperconductors(HTS)in 1986bytwoIBM scientists led to an unprecedented explosion of research and development efforts world-wide because of the signi cant potential for practical applications offered by these materials. However, the early euphoria created by the exciting prospects was dampenedby the dauntingtask of fabricating these materials into useful forms with acceptablesuperconductingproperties. Progresstowardsthisgoalhasbeen hindered by many intrinsic materials problems, such as weak-links, ux-creep, and poor - chanicalproperties. TheearlieststudiesofcriticalcurrentdensityJ inHTSmaterialsrevealedthatfor c apolycrystallinematerialcontainingadistributionofgrainboundariesismuchlower than that for a single crystal. High angle grain boundariesact as Josephson coupled weak-links leading to a signi cant eld-dependent suppression of the supercurrent acrosstheboundary. Forcleanstoichiometricboundaries,thegrainboundarycritical currentdensity dependsprimarilyonthe grainboundarymisorientation. The dep- denceof J (gb)onmisorientationanglehasbeendeterminedYBa O Cu (YBCO) c 2 3 7 in boundary types which can be formed in epitaxial lms on bicrystal substrates. Theseinclude[001]tilt,[100]tilt,and[100]twistboundaries. Ineachcasehighangle boundarieswerefoundtobeweak-linked. Theseexperimentshavealsobeenextended to arti cially fabricated [001] tilt bicrystals in Tl Ba CaCu O,Tl Ba Ca Cu O , 2 2 2 8 2 2 2 3 x TlBa Ca Cu O (Tl-1223) and Nd Ce CuO . In each case it was found that, 2 2 3 x 1. 85 0. 15 4 as in YBCO, J depends strongly on grain boundary misorientation angle. Data on c currenttransmissionacrossarti ciallyfabricatedgrainboundariesinBi-2212also- dicate that most large angle [001] tilt and [001] twist boundaries are weak links. It is likely that the variation in J with grain boundary misorientation is similar in all c high-T superconductors. Hence,thelow J observedinrandomlyorientedpolycr- c c tallineHTScanbeunderstoodonthebasisthatthepopulationoflowangleboundaries issmallandthatfrequenthighangleboundariesimpedelong-rangecurrent ow. - ingconventionalprocessingtechniques,threeHTSmaterialsweresuccessfullyfab- catedinpolycrystallineformwithmodestJ s. ThesearetheBi-2223powder-in-tube c conductors,theTl-1223spray-pyrolyzed lmsandtheBi-2212melt-processedthick lms. Thesethreetypesofconductorscomprisedthe First-GenerationHTScond- torsorwires.…

Buch. Condición: Neu. This item is printed on demand - Print on Demand Titel. Neuware -It is likely that the variation in J with grain boundary misorientation is similar in all c high-T superconductors. Hence,thelow J observedinrandomlyorientedpolycr- c c tallineHTScanbeunderstoodonthebasisthatthepopulationoflowangleboundaries issmallandthatfrequenthighangleboundariesimpedelong-rangecurrent ow. - ingconventionalprocessingtechniques,threeHTSmaterialsweresuccessfullyfab- catedinpolycrystallineformwithmodestJ ¿s. ThesearetheBi-2223powder-in-tube c conductors,theTl-1223spray-pyrolyzed lmsandtheBi-2212melt-processedthick lms. Thesethreetypesofconductorscomprisedthe First-GenerationHTScond- torsorwires.Springer-Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 368 pp. Englisch.…