کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5461091 1516184 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fabrication and growth mechanism of iron oxide insulation matrix for Fe soft magnetic composites with high permeability and low core loss
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Fabrication and growth mechanism of iron oxide insulation matrix for Fe soft magnetic composites with high permeability and low core loss
چکیده انگلیسی
Soft magnetic composites (SMCs) containing Fe powders embedded in insulating matrix have been fabricated via alkaline bluing as a new method. Effects of reaction time on the magnetic properties of the SMCs have been investigated. Mechanism of the oxidation process has also been revealed, which involves initial oxidation of Fe into Fe2+ (Na2FeO2) and Fe3+ (Na2Fe2O4) by NaNO2 and NaNO3 followed by hydrolysis of Fe2+ and Fe3+ into Fe3O4. Hydrolysis of the excessive Fe3+ leads to the formation of Fe2O3 which reduced the effective permeability of the SMCs. To form pure Fe3O4 coating, the reaction process has been improved to suppress the Fe3+ hydrolysis. The obtained ferromagnetic Fe3O4 coating effectively reduces magnetic dilution, while its high electrical resistivity allows satisfactory insulation between the Fe powders, giving rise to simultaneous high effective permeability (97.7) and low core loss (771.3 mW/cm3) of the SMC.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 710, 5 July 2017, Pages 138-143
نویسندگان
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