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Formation of the Bi(2)Sr(2)CaCu(2)O(8+delta) superconductor with Mg(1-x)Cu(x)O inclusions: the phases compatibility and the effect of the preparation route on the material microstructure and propertiesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Kazin P.E., Tretyakov Y.D., Lennikov V.V., Jansen M.
- Журнал: Journal of Materials Chemistry
- Том: 11
- Номер: 1
- Год издания: 2001
- Издательство: Royal Society of Chemistry
- Местоположение издательства: United Kingdom
- Первая страница: 168
- Последняя страница: 172
- DOI: 10.1039/b002795m
- Аннотация: A compatibility between Bi(2)Sr(2)CaCu(2)O(8+delta) (Bi-2212) and MgO was investigated, and the Bi-2212-Mg(1-x)Cu(x)O composite materials were obtained and characterised. It was established that Bi-2212 interacts with the MgO powder at 850 degreesC producing (Sr,Ca)(4-y)Bi(2)O(z) and the Mg(1-x)Cu(x)O solid solution, while single crystal MgO is stable against Bi-2212 solid and melt up to 1100 degreesC. The Bi-2212 phase is found to coexist with Mg(1- x)Cu(x)O, where x greater than or equal to 0.08, at 850 degreesC in air. Magnesium oxide content is estimated to be under 1 mol% in the solid Bi-2212 phase, as well as in the phases formed via the Bi-2212 peritectic decomposition, and in the Bi-Sr-Ca-Cu-O melt. The Bi-2212-Mg(1-x)Cu(x)O superconducting composites were prepared by melt-processing using different precursors. The effect of the precursor on the material microstructure and superconducting properties was investigated. The Mg(1- x)Cu(x)O submicron particles were found to be rather uniformly distributed in the Bi-2212 matrix, their size depending on the preparation conditions. Application of the nanosize MgO powder as a precursor indicated substantial coarsening of the magnesium oxide particles during the composite processing, the average particle size exceeding 0.2 mum. The composites exhibited higher critical current density as well as better field stability at enhanced temperatures in comparison with the Bi-2212 samples.
- Добавил в систему: Казин Павел Евгеньевич