NO890741L - IMPROVED PROCEDURE FOR MANUFACTURING 90 K SUPER conductors. - Google Patents
IMPROVED PROCEDURE FOR MANUFACTURING 90 K SUPER conductors.Info
- Publication number
- NO890741L NO890741L NO89890741A NO890741A NO890741L NO 890741 L NO890741 L NO 890741L NO 89890741 A NO89890741 A NO 89890741A NO 890741 A NO890741 A NO 890741A NO 890741 L NO890741 L NO 890741L
- Authority
- NO
- Norway
- Prior art keywords
- approx
- precursor powder
- manufacturing
- oxygen
- containing atmosphere
- Prior art date
Links
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
Det er beskrevet en forbedret frem-gangsmåte for fremstilling av et supra-ledende materiale som har formelen MBa2Cu^Ox hvori M er valgt fra gruppen bestående av Y, Nd, Sm, Eu, Gd, Dy, JIo, Ef, Tm, Yb og Lu, x er fra ca. 6,5 til ca. 7,0, idet materialet har en supra-ledningsovergangstemperatur av ca. 90 K, idet fremgangsmåten i det vesentlige be-står av oppvarming av et forløperpulver i en oxygenholdig atmosfære ved en tem-peratur fra ca. 875°C til ca. 950°C i en tid tilstrekkelig til å danne MBa.,CuOy, hvor y er fra ca. 6,0 til ca. 6,4, og opprettholdelse av dette MBa2Cu30y i en oxygenholdig atmosfære under avkjøling i en tid som ef tilstrekkelig til å oppnå det ønskede produkt, idet det nevnte forløperpulver fremstilles ved (a) dannelse av en vandig oppløsning av M(N0), Ba(N0)og Cu(N0)i et atom-forhold M:Ba:Cu av ca. 1:2:3, (b) til-setning av den erholdte oppløsning til tilstrekkelig med oxalsyre til å utfelle de tilstedeværende metaller som salter, og sprøytetørking av den erholdte opp-slemning for å oppnå forlperpulveret..There is described an improved process for the preparation of a superconducting material having the formula MBa2Cu Lu, x is from approx. 6.5 to approx. 7.0, the material having a supra-wire 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 MBa., CuOy, where y is from approx. 6.0 to approx. 6.4, and maintaining this MBa2Cu30y in an oxygen-containing atmosphere while cooling for a time sufficient to obtain the desired product, said precursor powder being prepared by (a) forming an aqueous solution of M (NO), Ba ( N0) and Cu (N0) in an atomic ratio M: Ba: Cu of approx. 1: 2: 3, (b) adding the resulting solution to sufficient oxalic acid to precipitate the metals present as salts, and spray-drying the resulting slurry to obtain the precursor powder.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/064,951 US4898851A (en) | 1987-06-22 | 1987-06-22 | Process for making 90 k superconductors using a spray dried oxalate precursor |
| PCT/US1988/001880 WO1988010235A1 (en) | 1987-06-22 | 1988-06-09 | Improved process for making 90 k superconductors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO890741D0 NO890741D0 (en) | 1989-02-21 |
| NO890741L true NO890741L (en) | 1989-04-21 |
Family
ID=26745066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO89890741A NO890741L (en) | 1987-06-22 | 1989-02-21 | IMPROVED PROCEDURE FOR MANUFACTURING 90 K SUPER conductors. |
Country Status (2)
| Country | Link |
|---|---|
| DK (1) | DK655089A (en) |
| NO (1) | NO890741L (en) |
-
1989
- 1989-02-21 NO NO89890741A patent/NO890741L/en unknown
- 1989-12-21 DK DK655089A patent/DK655089A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| NO890741D0 (en) | 1989-02-21 |
| DK655089D0 (en) | 1989-12-21 |
| DK655089A (en) | 1990-02-21 |
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