کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
12017286 | 1025170 | 2019 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and properties of barium ferrite nano-powders by chemical co-precipitation method
ترجمه فارسی عنوان
سنتز و خواص نانو پودر فریت باریم با روش همبستگی شیمیایی
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کلمات کلیدی
نانو پودر، هگزافرید باریم، هم رسوبی، شکر کردن ذرات تک دامنه،
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
چکیده انگلیسی
Nano-powders with controllable particle size, excellent magnetic properties and thermal stability of barium hexaferrite (BaFe12O19) have been synthesized via a co-precipitation/calcination technique. The phase composition, morphology and magnetic/thermal properties of the products were systematically studied. XRD patterns reveal that a long co-precipitation reaction time (5â¯h) and high calcination temperature (1100â¯Â°C) are beneficial for the formation of BaFe12O19 phase and decreasing the tendency to agglomeration. SEM micrographs show that the products show a hexagonal flake-like particle shape and the size are well controlled and maintained at single-domain particle size range area (<460â¯nm), above which the coercivity will decrease abruptly for the coupling exchange among particles. The products with jHc of 5934â¯Oe, temperature coefficient of remanence (αBr) of â0.176% Kâ1 and temperature coefficient of coercivity (βjHc) of 0.0427% Kâ1 were obtained when co-precipitated for 5â¯h and calcined at 900â¯Â°C for 2â¯h. A high saturation magnetization of 66.9â¯emu/g was obtained when co-precipitated for 5â¯h and calcined at 1100â¯Â°C for 2â¯h, approaching the theoretical saturation magnetization (72â¯emu/g).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 473, 1 March 2019, Pages 79-84
Journal: Journal of Magnetism and Magnetic Materials - Volume 473, 1 March 2019, Pages 79-84
نویسندگان
S.L. Hu, J. Liu, H.Y. Yu, Z.W. Liu,