本文選題：Fe-基納米晶磁性材料 + 快速退火��； 參考：《電子科技大學》2017年碩士論文

【摘要】：自從Fe-基納米晶合金問世以來,因其優(yōu)良的軟磁性能,諸多學者開始對其研究報道,并取得了大量的成果。但是,在高頻領域因其作為合金而具有的過高的介電常數(shù)特性,導致阻抗嚴重不匹配,從而影響了其高頻性能。為了實現(xiàn)優(yōu)化該材料的高頻性能,本論文首先系統(tǒng)全面的探索了常規(guī)退火工藝對FIENMET合金的各種影響。這些探索包括退火工藝對FINEMET合金晶相成分組成的影響、不同晶相組分的特殊性質(zhì)、形狀因素對性能的影響等。對于Fe-基納米晶合金來說,由于此類納米晶合金材料的介電常數(shù)相比于磁導率來說其值太高,單獨磁導率的提高對于吸波性能的提高效果并不明顯。為了進一步提高樣品的高頻性能,必須想辦法大幅降低樣品的高頻介電性能�？萍脊ぷ髡咭矊档虵e-基納米晶合金介電常數(shù)的措施做了很多探索,其中效果做最好的就是氧化包覆。這種思路簡單來說,就是在高磁導率、高介電常數(shù)的樣品外面包覆一層沒有電磁性能的氧化物等,從而降低樣品的介電常數(shù)。這種方法雖然在一定程度上可行,但是工藝流程太麻煩,需要在對樣品晶化退火處理之后,再進行氧化包覆,不適合規(guī)模化生產(chǎn)。同時,包覆的氧化物對材料的磁導率優(yōu)化以及電磁波的吸收沒有任何幫助。我們對Fe-基納米晶合金的優(yōu)化方法是使用快速退火工藝處理樣品。利用樣品的結(jié)構(gòu)特點:細小的納米晶粒彌散的分布在具有高電阻率的非晶軟磁基體上。通過快速退火工藝處理樣品使樣品的高電導率軟磁晶相部分被高電阻率的非晶相、硬磁相等包圍起來,這種方法類似于包覆處理,而且包圍在軟磁相上的非晶相也是磁性材料也可以參與吸收電磁波。同時,快速處理工藝由于急速達到設定溫度,減少了過渡態(tài)的存在,并使晶粒來不及長大,會使晶粒細化,從而達到減小介電常數(shù)的目的,大幅優(yōu)化Fe-基納米晶的高頻性能。
[Abstract]:Since the advent of Fe-based nanocrystalline alloys, due to their excellent soft magnetic properties, many scholars began to report on them, and made a lot of achievements. However, in the high frequency field, because of its high dielectric constant as alloy, the impedance is seriously mismatched, thus affecting its high frequency performance. In order to optimize the high frequency properties of the FIENMET alloy, the influence of conventional annealing process on the FIENMET alloy was studied in this paper. These researches include the effect of annealing process on the composition of crystal phase of FINEMET alloy, the special properties of different crystal phase components, and the influence of shape factors on the properties of FINEMET alloy. For Fe- based nanocrystalline alloys, because the permittivity of this kind of nanocrystalline alloy is too high compared with the permeability, the enhancement of the single permeability is not obvious. In order to further improve the high frequency properties of the samples, we must find a way to significantly reduce the high frequency dielectric properties of the samples. Scientists have also explored ways to reduce the permittivity of Fe- based nanocrystalline alloys, the best of which is oxidation coating. The simple idea is to coat the samples with high permeability and high dielectric constant with a layer of oxide without electromagnetic properties, so as to reduce the dielectric constant of the samples. Although this method is feasible to some extent, the process is too troublesome, and it is not suitable for large-scale production because it needs to be oxidized after annealing the samples. At the same time, the coated oxide is of no help to the optimization of permeability and the absorption of electromagnetic wave. We optimized the Fe-based nanocrystalline alloy by rapid annealing process. The fine nanocrystalline particles were dispersed on amorphous soft magnetic matrix with high resistivity. The high conductivity soft magnetic phase is surrounded by amorphous phase with high resistivity by rapid annealing process, and the hard magnetic field is equal. This method is similar to the coating treatment. The amorphous phase surrounded by the soft magnetic phase is also a magnetic material which can also participate in the absorption of electromagnetic waves. At the same time, the rapid treatment process can reduce the existence of transition state and make the grain grow too late, which can reduce the dielectric constant and optimize the high frequency properties of Fe-based nanocrystals.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TG156;TG131

【參考文獻】

相關期刊論文 前10條

1 賈愛珍;趙亞麗;郗慧蓉;李哲;;武器裝備隱身材料的發(fā)展現(xiàn)狀及趨勢[J];科技展望;2016年12期

2 湛永鐘;潘燕芳;黃金芳;梁江;王肖錚;;軟磁材料應用研究進展[J];廣西科學;2015年05期

3 孟宏;;電磁輻射對人體皮膚危害及其保護研究進展[J];中國化妝品;2015年08期

4 胡建民;王蕊;王春婷;張超;王月媛;;晶體X射線衍射模型和布拉格方程的一般推導[J];大學物理;2015年03期

5 龐建峰;馬喜君;謝興勇;;電磁吸波材料的研究進展[J];電子元件與材料;2015年02期

6 伊翠云;;雷達吸波材料研究進展[J];黑龍江科技信息;2014年12期

7 胡玉平;平凱斌;閆志杰;楊雯;宮長偉;;Finemet合金析出相α-Fe(Si)結(jié)構(gòu)與磁性的第一性原理計算[J];物理學報;2011年10期

8 曾朝陽;吳超;呂緒良;賈其;;基于有效介質(zhì)理論的吸波材料性能分析[J];安全與電磁兼容;2011年04期

9 張德芬;陳孝文;龍光文;蘆金柱;王斌;;退火工藝對Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9納米晶帶材耐腐蝕性能的影響[J];金屬熱處理;2010年12期

10 侯弘;;X-射線衍射分析儀簡介[J];西北地質(zhì);2010年02期

相關會議論文 前1條

1 張玉龍;李長德;楊淑麗;;納米隱身材料研究進展[A];中國化學會第二屆隱身功能材料學術(shù)研討會論文集[C];2004年

，

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