کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1622279 | 1516400 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structure and electromagnetic behavior of BaFe12â2x(Ni0.8Ti0.7)xO19â0.8x in the 2-12Â GHz frequency range
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Structure and electromagnetic behavior of BaFe12â2x(Ni0.8Ti0.7)xO19â0.8x in the 2-12Â GHz frequency range Structure and electromagnetic behavior of BaFe12â2x(Ni0.8Ti0.7)xO19â0.8x in the 2-12Â GHz frequency range](/preview/png/1622279.png)
چکیده انگلیسی
The non-stoichiometric Ni2+Ti4+ substituted barium ferrites have been prepared. The structure, complex permeability, complex permittivity and microwave absorption of BaFe12â2x(Ni0.8Ti0.7)xO19â0.8x with 0 â¤Â x â¤Â 2.0 were measured with X-ray diffraction (XRD), Mössbauer spectroscopy and microwave vector network analyzer. The XRD results show that a single-phase M-type barium hexaferrite can be obtained for x â¤Â 1.2. The microwave measurement results show that the non-stoichiometric Ni2+Ti4+ substitution has weak effect on the μⲠand Éâ³, but can significantly affect the μâ³, Éâ² and microwave absorption properties of barium ferrites in the frequency range from 2.0 to 12.0 GHz. With increasing substitution, the peak values of the imaginary part of complex permeability increase first, then decrease slimly, with the maximum of 0.4 for x = 1.2. The variation of absorption loss has been studied as a function of the frequency and the degree of substitution x. The maximum loss reaches â12.6 dB when the substitution amount of the Ni2+Ti4+ ions is 0.8. The peak positions of the maximum loss and imaginary part of complex permeability shift into lower frequency band. The substitution or vacancy content is possibly responsible for this microwave response behavior of the non-stoichiometric Ni2+Ti4+ substituted barium ferrites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 477, Issues 1â2, 27 May 2009, Pages 488-492
Journal: Journal of Alloys and Compounds - Volume 477, Issues 1â2, 27 May 2009, Pages 488-492
نویسندگان
Xin Tang, Yuanguang Yang, Keao Hu,