کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1623004 1516405 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrical properties of copper and titanium-codoped zinc ferrites
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Electrical properties of copper and titanium-codoped zinc ferrites
چکیده انگلیسی
In this study, the effects of Cu and Ti substitution on the sintering behavior, substitution mechanism, resistivity and dielectric properties of (Zn)(Cux Tix Fe1.98−2x)O3.97 were investigated using X-ray diffractometer, scanning electron microscopy, and dilatometer. The results indicate that codoped Cu2+ and Ti4+ can effectively promote zinc ferrite densification. For the samples with x = 0-0.05, Cu2+ and Ti4+ ions dissolved into the spinel structure and mainly occupied the octahedral sites, which resulted in an increase in resistivity. For the specimen with x = 0.1 and 0.2, the Cu-rich and Zn-rich precipitates occurred at the grain boundary, leading to a decrease in resistivity. The variations in dielectric constant for samples with various x values as a function of frequency can be explained using the space charge polarization arising from the differences between the conductivity of the various phases present.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 472, Issues 1–2, 20 March 2009, Pages 516-520
نویسندگان
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