COMPOSITIONS FOR MELT PROCESSING HIGH TEMPERATURE SUPERCONDUCTOR
A melt processing method for bulk or thick film fabrication of RE123 superconductor material includes the steps of using Nd in the RE123 to increase the recrystallization speed of the RE123, and using a heavy rare earth in the RE123 to establish the peritectic melting point of the RE123 somewhere be...
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| description | A melt processing method for bulk or thick film fabrication of RE123 superconductor material includes the steps of using Nd in the RE123 to increase the recrystallization speed of the RE123, and using a heavy rare earth in the RE123 to establish the peritectic melting point of the RE123 somewhere below the melting point of silver. Within these requirements, the method essentially includes heating the RE123 above its peritectic melting point, and then cooling the resultant decomposed material to recrystallize the RE123. The heavy rare earths to be used for lowering the RE123 peritectic melting temperature include Lu, Yb, Tm or Er or mixtures thereof. The addition of RE211, silver and the use of a low oxygen partial pressure also contribute to a lowering of the melting point of the RE123. When using Nd to accelerate the processing time, the RE123 can include a first component of Nd1-zRz123 and a second component of Nd1-yRy211. For these components, R is one of the heavy rare earths, z is between 0 and approximately 0.9, and y is between 0 and approximately 0.9. |
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Within these requirements, the method essentially includes heating the RE123 above its peritectic melting point, and then cooling the resultant decomposed material to recrystallize the RE123. The heavy rare earths to be used for lowering the RE123 peritectic melting temperature include Lu, Yb, Tm or Er or mixtures thereof. The addition of RE211, silver and the use of a low oxygen partial pressure also contribute to a lowering of the melting point of the RE123. When using Nd to accelerate the processing time, the RE123 can include a first component of Nd1-zRz123 and a second component of Nd1-yRy211. For these components, R is one of the heavy rare earths, z is between 0 and approximately 0.9, and y is between 0 and approximately 0.9.</description><edition>6</edition><language>eng ; fre</language><subject>AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE ; APPARATUS THEREFOR ; BASIC ELECTRIC ELEMENTS ; CABLES ; CHEMISTRY ; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F ; CONDUCTORS ; CRYSTAL GROWTH ; ELECTRICITY ; INORGANIC CHEMISTRY ; INSULATORS ; METALLURGY ; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE ; REFINING BY ZONE-MELTING OF MATERIAL ; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES ; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE ; SINGLE-CRYSTAL-GROWTH ; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL</subject><creationdate>2002</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20020709&DB=EPODOC&CC=CA&NR=2173273C$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20020709&DB=EPODOC&CC=CA&NR=2173273C$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>WOOLF, LAWRENCE D</creatorcontrib><title>COMPOSITIONS FOR MELT PROCESSING HIGH TEMPERATURE SUPERCONDUCTOR</title><description>A melt processing method for bulk or thick film fabrication of RE123 superconductor material includes the steps of using Nd in the RE123 to increase the recrystallization speed of the RE123, and using a heavy rare earth in the RE123 to establish the peritectic melting point of the RE123 somewhere below the melting point of silver. Within these requirements, the method essentially includes heating the RE123 above its peritectic melting point, and then cooling the resultant decomposed material to recrystallize the RE123. The heavy rare earths to be used for lowering the RE123 peritectic melting temperature include Lu, Yb, Tm or Er or mixtures thereof. The addition of RE211, silver and the use of a low oxygen partial pressure also contribute to a lowering of the melting point of the RE123. When using Nd to accelerate the processing time, the RE123 can include a first component of Nd1-zRz123 and a second component of Nd1-yRy211. 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Within these requirements, the method essentially includes heating the RE123 above its peritectic melting point, and then cooling the resultant decomposed material to recrystallize the RE123. The heavy rare earths to be used for lowering the RE123 peritectic melting temperature include Lu, Yb, Tm or Er or mixtures thereof. The addition of RE211, silver and the use of a low oxygen partial pressure also contribute to a lowering of the melting point of the RE123. When using Nd to accelerate the processing time, the RE123 can include a first component of Nd1-zRz123 and a second component of Nd1-yRy211. For these components, R is one of the heavy rare earths, z is between 0 and approximately 0.9, and y is between 0 and approximately 0.9.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record> |
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| subjects | AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE APPARATUS THEREFOR BASIC ELECTRIC ELEMENTS CABLES CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F CONDUCTORS CRYSTAL GROWTH ELECTRICITY INORGANIC CHEMISTRY INSULATORS METALLURGY PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE REFINING BY ZONE-MELTING OF MATERIAL SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE SINGLE-CRYSTAL-GROWTH UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL |
| title | COMPOSITIONS FOR MELT PROCESSING HIGH TEMPERATURE SUPERCONDUCTOR |
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