Synthesis of 110 K Bi(Pb)-Sr-Ca-Cu-O Oxide Superconductors
Synthesis of 110 K Bi(Pb)-Sr-Ca-Cu-O Oxide Superconductors
复制标题
110 K Bi(Pb)-Sr-Ca-Cu-O 氧化物超导体的合成
DOI：
10.1143/jjap.28.l27
复制
发表时间：
1989
影响因子：
1.5
通讯作者：
R. Yoshizaki
中科院分区：
文献类型：
--
作者：
S. Narumi;H. Ohtsu;I. Iguchi;R. Yoshizaki
本文报道了高Tc Bi（Pb）-Sr-Ca-Cu-O超导体的合成。在845°C烧结200-300 h的样品在110 K时电阻为零。烧结300 h后得到最佳样品。的直流磁化率测量表明，存在53%的高Tc相和4%的低Tc相的样品体积比。几天后，Tc从110 K下降到108 K，表明Tc=110 K状态是亚稳态。从烧结时间、气氛、淬火和退火工艺以及原始混合料中铅含量的角度研究了高Tc相的合成。
The synthesis of high-Tc Bi(Pb)-Sr-Ca-Cu-O superconductors is reported in this Letter. Zero resistance is attained at 110 K for the samples sintered at 845°C for 200–300 h. The best sample is obtained after 300 h sintering. The dc magnetic susceptibility measurement shows the presence of 53% of a high-Tc phase and 4% of a low-Tc phase in terms of the sample-volume ratio. The Tc decreased from 110 K to 108 K after a few days, suggesting that the Tc=110 K state is metastable. The synthesis of the high-Tc phase is studied from the viewpoint of sintering time, gas atmosphere, quenching and annealing procedures, and the Pb content in the original mixed materials.