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首页> 外文期刊>Journal of Materials Science. Materials in Electronics >Preparation and electromagnetic characteristics of silica coated Fe-Ni-Mo alloy flakes
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Preparation and electromagnetic characteristics of silica coated Fe-Ni-Mo alloy flakes

机译：二氧化硅包覆的Fe-Ni-Mo合金薄片的制备及电磁性能

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摘要

The Fe-Ni-Mo alloy flakes were firstly prepared from water atomized powders. Subsequently, by a facile sol-gel technique using tetraethylorthosili-cate (Si(OC_2H_5)_4) as a precursor, we successfully synthesized silica coated Fe-Ni-Mo alloy flakes. These products were characterized by Scanning Electron Microscopy (SEM), Fourier transform infrared spec-troscopy (FTIR) and X-ray photoelectron spectros-copy (XPS). Furthermore, their electromagnetic parameters, complex permittivity and complex permeability within 2-12 GHz were measured. The results show that both ε′ and ε″ values of the silica coated flakes substantially decrease with the increase of coating times. Meanwhile, the μ′ values of silica coated samples are larger than those of the as-milled sample at the high frequencies. However, the maximum μ′ exhibits a decline while resonance frequency shifts to high values with the increase of coating times. The calculated reflection loss (RL) curve reveals that a proper thickness of coating can redound to improve the absorbing performances of silica coated Fe-Ni-Mo alloy flakes in high frequency range.
机译：Fe-Ni-Mo合金鳞片首先由水雾化粉末制备而成。随后，通过以四乙基原硅酸酯（Si（OC_2H_5）_4）为前体的简便溶胶-凝胶技术，成功合成了二氧化硅包覆的Fe-Ni-Mo合金薄片。这些产品通过扫描电子显微镜（SEM），傅里叶变换红外光谱（FTIR）和X射线光电子能谱（XPS）进行了表征。此外，还测量了它们在2-12 GHz范围内的电磁参数，复介电常数和复磁导率。结果表明，二氧化硅包覆的薄片的ε'和ε''值均随着包覆时间的增加而显着降低。同时，在高频下，二氧化硅涂层样品的μ'值大于研磨后样品的μ'值。然而，最大的μ'呈现下降，而共振频率随着涂覆时间的增加而移至高值。计算得出的反射损耗（RL）曲线表明，适当的涂层厚度可以提高高频范围内二氧化硅涂层的Fe-Ni-Mo合金薄片的吸收性能。

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