NO890561L - IMPROVED PROCEDURE FOR MANUFACTURING 90 K SUPER conductors. - Google Patents
IMPROVED PROCEDURE FOR MANUFACTURING 90 K SUPER conductors.Info
- Publication number
- NO890561L NO890561L NO89890561A NO890561A NO890561L NO 890561 L NO890561 L NO 890561L NO 89890561 A NO89890561 A NO 89890561A NO 890561 A NO890561 A NO 890561A NO 890561 L NO890561 L NO 890561L
- Authority
- NO
- Norway
- Prior art keywords
- approx
- precursor powder
- manufacturing
- oxygen
- atomic ratio
- Prior art date
Links
Landscapes
- Superconductors And Manufacturing Methods Therefor (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
bet beskrives en forbedret frem-gangsmåte for fremstilling av et supraledende materiale med formelen MBa2Cu3<>x hvori M er valgt fra gruppen bestående av Y, Nd, Sm, Eu, Gd, Dy, .Ho, Er, Tm, Yb og Lu, x er fra ca. 6,5 til ca. 7,0, idet materialet har en supraledende overgangs-temperatur av ca. 90 K, idet fremgangs-måten i det vesentlige består av oppvar-ming av et forløperpulver i en oxygenholdig atmosfære ved en temperatur fra ca. 875° C til ca. 950° C i en tid tilstrekkelig til å danneBaCuOy, hvori y er fra ca. 6,0 til ca. 6,4, og opprettholdel-se av dette MBa2Cu^Ov i en oxygenholdig atmosfære under avkjøling i en tid som er tilstrekkelig til å oppnå det ønskede produkt, idet det nevnte forløperpulver fremstilles ved (a) blanding av pulvere. av,a(O)8H0 og CuO i et atomforhold H:Ba:Cu av ca. 1:2:3 eller (b) dannelse av en vandig oppløsning av M(N0), Ba(N0)og Cu(N0)i et atomforhold M:Ba:Cu av ca. 1:2:3, til-setning av tilstrekkelig med sitronsyre-monohydrat til den erholdte oppløsning. til å omvandle de tilstedeværende metal-ler til deres tilsvarende sitrater, og sprøytetørking av den erholdte oppløs-ning for å oppnå forløperpulveret.an improved process for the preparation of a superconducting material of the formula MBa2Cu3 <> x is described in which M is selected from the group consisting of Y, Nd, Sm, Eu, Gd, Dy, .Ho, Er, Tm, Yb and Lu, x is from approx. 6.5 to approx. 7.0, the material having a superconducting transition temperature of approx. 90 K, the process essentially consisting of heating a precursor powder in an oxygen-containing atmosphere at a temperature of from about 875 ° C to approx. 950 ° C for a time sufficient to form BaCuOy, wherein y is from approx. 6.0 to approx. 6.4, and maintaining this MBa 2 Cu 2 O 3 in an oxygen-containing atmosphere while cooling for a time sufficient to obtain the desired product, said precursor powder being prepared by (a) mixing powders. of, a (O) 8H0 and CuO in an atomic ratio H: Ba: Cu of approx. 1: 2: 3 or (b) formation of an aqueous solution of M (NO), Ba (NO) and Cu (NO) in an atomic ratio M: Ba: Cu of approx. 1: 2: 3, adding sufficient citric acid monohydrate to the resulting solution. to convert the metals present to their corresponding citrates, and spray-drying the resulting solution to obtain the precursor powder.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US5984787A | 1987-06-09 | 1987-06-09 | |
PCT/US1988/002025 WO1988010515A1 (en) | 1987-06-09 | 1988-06-08 | Improved process for making 90 k superconductors |
Publications (2)
Publication Number | Publication Date |
---|---|
NO890561D0 NO890561D0 (en) | 1989-02-09 |
NO890561L true NO890561L (en) | 1989-04-07 |
Family
ID=26739263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO89890561A NO890561L (en) | 1987-06-09 | 1989-02-09 | IMPROVED PROCEDURE FOR MANUFACTURING 90 K SUPER conductors. |
Country Status (2)
Country | Link |
---|---|
DK (1) | DK620789A (en) |
NO (1) | NO890561L (en) |
-
1989
- 1989-02-09 NO NO89890561A patent/NO890561L/en unknown
- 1989-12-08 DK DK620789A patent/DK620789A/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
DK620789D0 (en) | 1989-12-08 |
NO890561D0 (en) | 1989-02-09 |
DK620789A (en) | 1990-01-31 |
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