سال انتشار: ۱۳۸۷

محل انتشار: دومین کنگره بین المللی علوم و فناوری نانو

تعداد صفحات: ۲

نویسنده(ها):

M Montazeri-Pour – School of Metallurgy and Materials Engineering, University of Tehran, P. O. Box: 14395-553, Tehran, Iran
A Ataie –

چکیده:

Barium hexaferrite magnetic material has significant potential for applications such as permanent magnets and microwave absorbing coatings, because of the adequate combination of high Curie temperature, high coercivity, chemical stability and resistance to corrosion [1]. Fine BaO.6Fe2O3 particles also exhibit suitable properties for perpendicular magnetic recording media.In order to improve the material properties, several non-conventional chemical routes such as co-precipitation [2], hydrothermal [3] and sol–gel [4] have been employed to synthesize barium hexaferrite. Among these methods, co-precipitation is the most attractive due to simple operation and ease of mass production.The use of a mixed solvent is a new approach in nanomaterials synthesis and processing. Ethanol (CH3CH2OH) is a polar solvent which is miscible with water at any ratio, and the addition of ethanol to water can easily change its physicochemical properties.The objective of the present study is to investigate the influence of using 75 Vol.% ethanol as a co-solvent along with water on the formation mechanism, crystallite size and morphology of barium hexaferrite particles obtained by co-precipitation method