EP0301655A1
Expired / Lapsed
EP
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Method for preparing an oxidic superconductor material
Assignee: Koninklijke Philips NV
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Filing: 1988-07-20
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Granted: —
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Expires: 2008-07-20
Abstract
Abstract A fine-granular superconductive material, in particular YBa₂Cu₃O₇₋₆, is obtained by spray-drying an aqueous nitrate solution of the desired metal ions and subjecting the resulting powder to an oxidic treatment at high temperature. A very homogeneous bulky superconductive material can be manufactured with the resulting powder.
Inventors
- 👤 Jan Willem Severin
- 👤 Gijsbertus De With
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 04:30
CPC Classifications
C; C01; C01G; C01G3/00; C01G3/006; C04; C04B; C04B35/00; C04B35/01; C04B35/45; C04B35/4504; C04B35/4508; H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; C01P; C01P2002/00; C01P2002/70; C01P2002/76; C01P2004/00; C01P2004/60; C01P2004/62
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
63 words
A method of manufacturing a powdered oxidic superconductive material from an aqueous solution which comprises the desired metal ions in the desired stoechiometric ratio, characterized in that the solution is spray-dried after which the resulting powder is brought in a pre-heated furnace and is kept at a temperature of 725 to 850°C for at least 10 minutes after which the powder is cooled.
Claim 2
Independent Claim
63 words
A method of manufacturing a powdered oxidic superconductive material from an aqueous solution which comprises the desired metal ions in the desired stoechiometric ratio, characterized in that the solution is spray-dried after which the resulting powder is brought in a pre-heated furnace and is kept at a temperature of 725 to 850°C for at least 10 minutes after which the powder is cooled.
Claim 3
Dependent Claim
52 words
A method as claimed in Claim 1 of manufacturing powdered YBa₂Cu₃O₇₋₆, in which the aqueous solution comprises the metal ions Y³⁺, Ba²⁺ and Cu²⁺ in a ratio of 1 : 2 : 3 and in which the treatment at a temperature of 725 to 850°C is carried out in an oxidizing atmosphere.
Claim 4
Dependent Claim
53 words
A method of manufacturing bulky oxidic superconductive material in which the powder obtained by means of the method as claimed in Claim 1 or 2 is compressed isostatically at a pressure of from 1 to 20 kbar and a temperature lower than 450°C and is sintered at a temperature of 750 to 900°C.
Claim 5
Dependent Claim
31 words
Powdered oxidic superconductive material manufactured by means of the method as claimed in Claim 1 or 2, characterized in that the primary grain size of the powder is smaller than 0.3µm.
References Cited (Backward Citations)
No citation records indexed.
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