| Microstructure and phase evolution of ultrafine MgO doped Bi-2223/Ag tapes |
| L. Hua; J. Yoo; J. Ko; H. Kim; H. Chung; G. W. Qiao
|
| 1997
|
| 发表期刊 | Physica C-Superconductivity and Its Applications
 |
| ISSN | 0921-4534
|
| 卷号 | 291期号:1-2页码:149-154 |
| 摘要 | Ultrafine MgO particles were introduced into Bi2Sr2Ca2Cu3O10/Ag (Bi-2223/Ag) tapes fabricated by the standard powder-in-tube (PIT) process. It was found that the phase transformation rate is decreased with increasing MgO concentration, Slight degradation of Bi-2223 formation rate is suggested to be of advantage for grain connectivity and grain alignment, Excessive doping and high sintering temperature resulted in bad transport properties due to severe agglomeration of MgO particles and the growth of residual secondary phase. The critical current was improved from 17 A for undoped sample to nearly 27 A for 1 wt% MgO doped sample heat-treated at 835 degrees C and/or 839 degrees C. The results of J(c)-B measurements show that the ultrafine MgO particles, as additional flux pinning centers, may strengthen flux pinning effectively. (C) 1997 Elsevier Science B.V. |
| 部门归属 | chinese acad sci, inst met res, shenyang 110015, peoples r china. korea inst machinery & mat, chang won 641010, south korea.;hua, l (reprint author), chinese acad sci, inst met res, shenyang 110015, peoples r china
|
| 关键词 | Bi-2223/ag Tapes
Critical Current Density
Weak Links
Flux Pinning
Critical-current-density
Cu-o Wires
Magnetic-properties
Single-crystal
Flux Creep
Field
Irreversibility
Superconductors
Enhancement
Dependence
|
| URL | 查看原文
|
| WOS记录号 | WOS:000071199600019
|
| 引用统计 |
|
| 文献类型 | 期刊论文
|
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/37978
|
| 专题 | 中国科学院金属研究所
|
推荐引用方式
GB/T 7714 |
L. Hua,J. Yoo,J. Ko,et al. Microstructure and phase evolution of ultrafine MgO doped Bi-2223/Ag tapes[J]. Physica C-Superconductivity and Its Applications,1997,291(1-2):149-154.
|
| APA |
L. Hua,J. Yoo,J. Ko,H. Kim,H. Chung,&G. W. Qiao.(1997).Microstructure and phase evolution of ultrafine MgO doped Bi-2223/Ag tapes.Physica C-Superconductivity and Its Applications,291(1-2),149-154.
|
| MLA |
L. Hua,et al."Microstructure and phase evolution of ultrafine MgO doped Bi-2223/Ag tapes".Physica C-Superconductivity and Its Applications 291.1-2(1997):149-154.
|
修改评论