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Formation of SrSnO(3) shell-like inclusions in the Bi(2)Sr(2)CaCu(2)O(8+x) superconductor via chemical reactionстатья
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., Karpov A.S., Tretyakov Y.D., Jansen M.
- Журнал: Solid State Sciences
- Том: 3
- Номер: 3
- Год издания: 2001
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 285
- Последняя страница: 290
- DOI: 10.1016/S1293-2558(00)01092-X
- Аннотация: Superconducting composites Bi-2212-SrSnO(3) have been prepared by reacting between the Bi-Sr-Ca-Cu-O precursor and Sr(2)SnO(4) or Ca(2)SnO(4) at 800-950 degreesC, followed by crystallisation of Bi-2212 from the partial melt at decreasing temperature. The samples have been characterised by powder X-ray diffraction, scanning electron microscopy and magnetic measurements. The materials consist of large Bi-2212 lamellae and complex-shaped fine inclusions of SrSnO(3). The composite obtained using Sr(2)SnO(4) contains almost all the SrSnO(3) phase in the form of micron-sized spherical shells, which are partly included in Bi-2212 lamellae, partly agglomerated in-between. The shells are perforated, thus allowing the Bi-2212 crystals to grow through them. It has been found that the shell-like grains form at an early stage of the precursor thermal treatment between 800 and 850 degreesC. A mechanism of the SrSnO(3) shell formation is proposed. The composites exhibit T(c) in the range of 82-87 K and reveal up to five times better magnetic flux pinning at T greater than or equal to 30 K in comparison with the undoped Bi-2212 sample prepared using the same experimental procedure. (C) 2001 Editions scientifiques et medicales Elsevier SAS. All rights reserved.
- Добавил в систему: Казин Павел Евгеньевич