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Characteristics of Co3O4 and cobalt nanostructured microspheres: morphology, structure, reduction process and magnetic propertiesстатья
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: 22 февраля 2019 г.
- Авторы: Shatrova N., Yudin A., Levina V., Kuznetsov D., Novakova A., Dzidziguri E., Perov N., jean-Paul Issi
- Журнал: Materials Research Bulletin
- Том: 99
- Год издания: 2018
- Издательство: Pergamon Press Ltd.
- Местоположение издательства: United Kingdom
- Первая страница: 189
- Последняя страница: 195
- DOI: 10.1016/j.materresbul/2017.11.017
- Аннотация: Nanostructured magnetic cobalt microspheres were synthesized using a two-stage method. First, nanostructured cobalt oxide Co3O4 microspheres were produced by ultrasonic spray pyrolysis at different temperatures from 800 to 1100C. Second, the nanostructured powders obtained were reduced to metal cobalt in an hydrogen atmosphere at different temperatures from 220 to 350C. In this study the evolution of the morphology from Co3O4 nanostructured microspheres to nanostructured Co, resulting from the Co3O4 reduction process, and the structure of metal cobalt, were investigated. It was found that the metal cobalt agglomerates have the same shape and mean diameter (∼ 1,5 μm) as those of the cobalt oxide, Co3O4. The amount of Co microspheres with smaller diameters decreased with increasing reduction temperature. Also, the β-Co content increased with increasing reduction temperature.
- Добавил в систему: Новакова Алла Андреевна
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