...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physica, B. Condensed Matter >Influence of B, Al, Ga, In on the composition of Bi(Pb)SrCaCuO system
【24h】

Influence of B, Al, Ga, In on the composition of Bi(Pb)SrCaCuO system

机译：B，Al，Ga，In对Bi（Pb）SrCaCuO体系组成的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Samples with partial cationic substitution for bismuth in Bi(Pb)-Sr-Ca-Cu-O system were prepared to systematically examine phase formation due to different concentrations of B, Al, Ga and In. The elements were substituted in the range x=0-0.5 in the nominal formula Bi(1.8-x)A(x)Pb(0.26)Sr(2)Ca(2)Cu(3)O(y). X-ray diffraction analysis was carried out for phase analysis with special emphasis to detect impurity phases. All the samples were mixed phases of 2212 and 2223. Rietveld analysis was used to find out the ratio of the phases. Boron enhanced the formation of the 2223 phase up to x=0.5, but gallium deteriorated the high-temperature phase 2223 and the 2212 phase became dominant. The amount of 2223 phase was increased with increasing content of Al and In (up to x=0.2) and then was decreased. The lattice parameters of the superconducting phases were obtained, and no systematic variations with the dopant level were found. Scanning electron microscopy observations revealed the presence of small and irregular amounts of Ga and In in the chemical composition of superconducting grains and the existence of the various non-superconducting phases. Superconducting properties of the samples were characterized by the measurement of the temperature dependence of the electrical and magnetic properties. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 8]
机译：制备了在Bi（Pb）-Sr-Ca-Cu-O系统中用铋部分阳离子取代的样品，以系统地检查由于B，Al，Ga和In的浓度不同而引起的相形成。在名义公式Bi（1.8-x）A（x）Pb（0.26）Sr（2）Ca（2）Cu（3）O（y）中将元素替换为x = 0-0.5。 X射线衍射分析进行了相分析，并特别着重于检测杂质相。所有样品均为2212和2223的混合相。使用Rietveld分析找出相的比例。硼提高了2223相的形成，直至x = 0.5，但镓使高温相2223变质，而2212相成为主导。 2223相的含量随Al和In含量的增加而增加（最高x = 0.2），然后降低。获得了超导相的晶格参数，并且没有发现掺杂水平的系统变化。扫描电子显微镜观察表明，超导晶粒的化学成分中存在少量和不规则的Ga和In，并且存在各种非超导相。样品的超导性能通过测量电和磁性能的温度依赖性来表征。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：8]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号