JPS6483561A - Production of superconductor - Google Patents
Production of superconductorInfo
- Publication number
- JPS6483561A JPS6483561A JP62242924A JP24292487A JPS6483561A JP S6483561 A JPS6483561 A JP S6483561A JP 62242924 A JP62242924 A JP 62242924A JP 24292487 A JP24292487 A JP 24292487A JP S6483561 A JPS6483561 A JP S6483561A
- Authority
- JP
- Japan
- Prior art keywords
- disk
- density
- cooling plate
- amorphous material
- amorphous
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
PURPOSE:To obtain a high-density polycrystalline superconductor having high critical current density and worked in high accuracy, by locally heating and melting a formed oxide superconducting material, quenching the molten part, forming the obtained amorphous material into a prescribed shape and annealing in an oxidizing atmosphere. CONSTITUTION:For example, powdery raw materials composed of e.g. Y2O3, BaCO3 and CuO are mixed with each other at a molar ratio of 1:4:6 and formed to obtain a formed oxide superconducting material having a shape of e.g. disk 1. The material is placed on a cooling plate 2 made of a metal having high specific heat and an arc discharge is generated between the cooling plate and a carbon electrode 3 placed opposite to the cooling plate 2. The disk 1 is locally heated and melted 4 by the arc discharge and immediately quenched at a rate suitable for forming an amorphous structure (e.g. 10<2>-10<4> deg.C/sec). The process is repeatedly applied to the whole surface of the disk 1 to obtain an amorphous material 5 having a density of 5.8-6.2. The amorphous material is worked 5 into a prescribed shape in high accuracy (<=100mum) and annealed at 850-1,050 deg.C for 2-5hr in an oxidizing atmosphere such as O2 gas atmosphere. Oxygen is included in the amorphous material 5 to obtain a high-density polycrystalline superconductor 6 of formula YBa2Cu3O7, etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62242924A JPS6483561A (en) | 1987-09-28 | 1987-09-28 | Production of superconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62242924A JPS6483561A (en) | 1987-09-28 | 1987-09-28 | Production of superconductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6483561A true JPS6483561A (en) | 1989-03-29 |
Family
ID=17096234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62242924A Pending JPS6483561A (en) | 1987-09-28 | 1987-09-28 | Production of superconductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6483561A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02196007A (en) * | 1989-01-24 | 1990-08-02 | Matsushita Electric Ind Co Ltd | Production of superconductor |
| US5169136A (en) * | 1990-11-08 | 1992-12-08 | Daiwa Seiko, Inc. | Automatic paper feeder employing a lost motion mechanism |
-
1987
- 1987-09-28 JP JP62242924A patent/JPS6483561A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02196007A (en) * | 1989-01-24 | 1990-08-02 | Matsushita Electric Ind Co Ltd | Production of superconductor |
| US5169136A (en) * | 1990-11-08 | 1992-12-08 | Daiwa Seiko, Inc. | Automatic paper feeder employing a lost motion mechanism |
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