| 发明名称 |
IMPROVED PROCESSING OF OXIDE SUPERCONDUCTORS |
| 摘要 |
A method for preparing a BSCCO-2223 oxide superconducting article includes annealing an oxide superconductor article comprised of BSCCO-2223 oxide superconductor at a temperature selected from the range of about 500 DEG C </= T </= 787 DEG C and an annealing atmosphere having an oxygen pressure selected from within the region having a lower bound defined by the equation: P02(lower) >/= 3.5 x 10<10>exp(-32,000/T + 273) and an upper bound defined by the equation: P02(upper) </= 1.1 x 10<12>exp(-32,000/T + 273). The article is annealed for a time sufficient to provide at least a 10 % increase in critical current density as compared to the critical current density of the pre-anneal oxide superconductor article. An oxide superconductor having the formula Bi2-yPbySr2Ca2Cu3O10 + x, where 0 </= x </= 1.5 and where 0 </= y </= 0.6 is obtained, the oxide superconductor characterized by a critical transition temperature of greater than 111.0 K, as determined by four point probe method. |
| 申请公布号 |
WO9423459(A1) |
申请公布日期 |
1994.10.13 |
| 申请号 |
WO1994US03575 |
申请日期 |
1994.04.01 |
| 申请人 |
AMERICAN SUPERCONDUCTOR CORPORATION |
发明人 |
RILEY, GILBERT, N., JR.;OTTO, ALEXANDER;CARTER, WILLIAM, L. |
| 分类号 |
C04B35/45;C01G1/00;C01G3/00;C01G29/00;H01B12/02;H01B13/00;H01L39/24;(IPC1-7):H01L39/24 |
主分类号 |
C04B35/45 |
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