The role of precursors in making Bi(Pb)-Sr-Ca-Cu-O superconductors
Autor: | Chen Xiaolong, Ji Yangyang, Jia Shunlian, Wu Fei, Xie Si-Shen, Chen Zhan, Liang Jing-Kui |
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Rok vydání: | 1990 |
Předmět: | |
Zdroj: | Superconductor Science and Technology. 3:622-626 |
ISSN: | 1361-6668 0953-2048 |
Popis: | Sr-Ca-Cu-O compounds were used as precursors to prepare Bi system superconductors. When Sr2Ca2Cu3O7 and Sr2Ca2Cu4O8 react with Bi2O3 (PbO) for 30 h, samples of Tc(0) higher than 100 K were obtained. Bi2O3 may have been directly inserted into the layered structures of Sr-Ca-Cu-O compounds and hence Bi-system superconductors formed; the authors found that the existence of Ca7Bi10O22 in the Bi system superconductors reduced Tc(0), and extra CuO assisted the formation of the superconducting phase. |
Databáze: | OpenAIRE |
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