کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7994647 | 1516160 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fabrication of M-type ferrites with high La-Co concentration through Ca2+ doping
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
Ca2+ doped Sr0.45-xCaxLa0.55Fe11.6Co0.4O19 (x = 0, 0.15, 0.3, and 0.45) ferrites were fabricated through a conventional ceramic process. The influences of Ca2+ doping on the microstructure and magnetic properties of ferrites were investigated. Ca2+ doping could mitigate the presence of impurity phase (CoFe2O4) in ferrites. Single phase M-type ferrites could be fabricated when x â¥Â 0.3. Additional Co2+ ions entered the crystal lattice and preferentially occupied the 4f2 site with Ca2+ doping. This effect greatly improved the remanence (Br) and intrinsic coercivity (Hcj) when x increased from 0 to 0.3. The average grain size of sintered ferrites slightly increased with the amount of doped Ca2+ ions. This behavior led to the deterioration of Hcj when x increased from 0.3 to 0.45. Consequently, ferrite prepared with x = 0.3 presented the highest maximum energy product ((BH)max) of 5.24MGOe. This performance is much higher than that of conventional La-Co substituted Sr-ferrites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 734, 15 February 2018, Pages 130-135
Journal: Journal of Alloys and Compounds - Volume 734, 15 February 2018, Pages 130-135
نویسندگان
Li Yuping, Bao Daxin, Wang Zhangzhong, Yujing Zhang, Chen Lizhao, Zha Guangcheng, Wu Mengling,