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Structure and properties of Ba(6-x)Ln(x)Nb(10)O(30), Ln=La, Ce and Nd compoundsстатья
Информация о цитировании статьи получена из
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Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Dyachenko O.G., Istomin S.Y., Fedotov M.M., Antipov E.V., Svensson G., Nygren M., Holm W.
- Журнал: Materials Research Bulletin
- Том: 32
- Номер: 4
- Год издания: 1997
- Издательство: Pergamon Press Ltd.
- Местоположение издательства: United Kingdom
- Первая страница: 409
- Последняя страница: 419
- DOI: 10.1016/S0025-5408(97)80008-6
- Аннотация: Ba(6-x)Ln(x)Nb(10)O(30) compounds, Ln = La, Ce and Nd, with a tetragonal tungsten bronze-type structure have been synthesized and were characterized by X-ray powder diffraction and EDS analysis. The homogeneity regions of the obtained compounds were found to be 0 less than or equal to x less than or equal to 2 for La, and 0 less than or equal to x less than or equal to 1.5 for Ce and Nd. The crystal structures of Ba5LaNb10O30 and Ba4La2Nb10O30 were refined using X-ray powder diffraction data. Refinement indicated the presence of vacancies in the Ba/La positions. This observation was supported by oxidation studies of the La-substituted compounds. The temperature dependence of the normalized resistivity of the compounds showed a nonmetallic behavior. The increase in the R/R(273) ratio with decreasing temperature is less distinct for the phases with the higher concentration of rare-earth cation. Copyright (C) 1997 Elsevier Science Ltd.
- Добавил в систему: Антипов Евгений Викторович