运用电磁吸波材料是解决电磁辐射/干扰难题和提升武器装备隐身性能的有效手段。基于掺杂诱导作用调控电磁特性的策略,以稀土离子钆(Gd3+)为掺杂离子,采用溶剂热法制备Gd3+掺杂铁氧体(GdxFe3-xO4)磁性吸波材料,并探究Gd3+掺入量对材料微观结构、磁性能和吸波性能的影响。结果表明:Gd3+的掺入对产物晶型和微观形貌影响不显著,磁性颗粒尺寸随着Gd3+掺入量的增加而减小。适量Gd3+的掺入可以提高材料的磁性能,Gd0.04Fe2.96O4的饱和磁化强度达66.49emu/g。此外,当在基体填充率为70%时,最大反射损耗为-47.25dB,有效吸收带宽为5.94GHz,这表明GdxFe3-xO4磁性材料有望成为一种极具应用价值的电磁吸波材料。
The use of electromagnetic absorbing materials is an effective means of solving electromagnetic radiation/interference challenges and enhancing the stealth performance of weapons and equipment.In this paper,based on the strategy of doping-induced effect to regulate electromagnetic properties,rare earth gadolinium ions (Gd3+) were used as the dopant ions to prepare magnetic wave-absorbing materials of Gd3+-doped ferrite (GdxFe3-xO4) by the solvothermal method.The effect of Gd3+ doping amount on the microstructure,magnetic properties and wave-absorbing performance of the materials was investigated.The results showed that the doping of Gd3+ had no significant effect on the crystalline shape and microstructure of the products,and the size of magnetic particles decreased with the increase of Gd3+ doping.The magnetic properties of the material could be improved by the appropriate amount of Gd3+ doping,and the saturation magnetization intensity of Gd0.04Fe2.96O4 reached 66.49emu/g.In addition,the maximum reflection loss was -47.25dB and the effective absorption bandwidth was 5.94GHz when the filling rate of the matrix was 70wt.%.This indicated that GdxFe3-xO4 magnetic material was expected to be a highly valuable electromagnetic absorbing material.
[1] Liang L,Gu W,Wu Y,et al.Heterointerface engineering in electromagnetic absorbers:new insights and opportunities[J].Advanced Materials,2022,34(4):2106195.
[2] 黄奕嘉.基于超构表面的电磁波振幅和位相调控技术研究[D].北京:中国科学院大学,2020.
[3] Peng F,Dai M,Wang Z,et al.Progress in graphene-based magnetic hybrids towards highly efficiency for microwave absorption[J].Journal of Materials Science & Technology,2022,106:147-161.
[4] Elmahaishi M F,Ismail I,Muhammad F D.A review on electromagnetic microwave absorption properties:their materials and performance[J].Journal of Materials Research and Technology,2022,20:2188-2220.
[5] 张茂润,张然,陈静.钴掺杂对纳米镝铁氧体结构和磁特性的影响[J].中国稀土学报,2017,35(2):209-214.
[6] Xie X B,Wang B,Wang Y,et al.Spinel structured MFe2O4 (M=Fe,Co,Ni,Mn,Zn) and their composites for microwave absorption:a review[J].Chemical Engineering Journal,2022,428:131160.
[7] Su X,Liu Y,Liao Z,et al.A review of 1D magnetic nanomaterials in microwave absorption[J].Journal of Materials Science,2023,58:636-663.
[8] Liu Y,Tian C,Wang F,et al.Dual-pathway optimization on microwave absorption characteristics of core-shell Fe3O4@C microcapsules:composition regulation on magnetic core and MoS2 nanosheets growth on carbon shell[J].Chemical Engineering Journal,2023,461:141867.
[9] 任庆国,尹庆国,刘玉杰,等.稀土掺杂钡铁氧体吸波涂层性能研究[J].光电技术应用,2019,34(4):24-28.
[10] 高静,马志军,张琪,等.稀土Gd3+掺杂对钴铁氧体结构与吸波性能的影响[J].稀有金属材料与工程,2020,49(7):2524-2529.
[11] 杨欢.稀土掺杂Mg0.2Mn0.8Fe2O4纳米晶的制备及其性能研究[D].武汉:武汉理工大学,2019.
[12] 翁兴媛,陈宏伟,马志军,等.不同稀土Nd3+掺杂含量对锰锌铁氧体吸波性能的影响[J].硅酸盐通报,2019,38(11):3392-3396.
[13] Gan Y,Zhang J,Lei S,et al.Atomically precise multi-domain GdxFe3-xO4 nanoclusters with modulated contrast properties for T2-weighted magnetic resonance imaging of early orthotopic cancer[J].Chemical Engineering Journal,2022,429:132255.
[14] Almessiere M A,Slimani Y,Korkmaz A D,et al.Sonochemical synthesis of Dy3+ substituted Mn0.5Zn0.5Fe2-xO4 nanoparticles:structural,magnetic and optical characterizations[J].Ultrasonics Sonochemistry,2020,61:104836.
[15] 李世雯.稀土(Nd,Sm,Gd,Dy,Yb,Sc)掺杂铁氧体的制备和性能研究[D].南宁:广西大学,2021.
[16] Deng H,Li X,Peng Q,et al.Monodisperse magnetic single-crystal ferrite microspheres[J].Angewandte Chemie International Edition,2005,44(18):2782-2785.
[17] Lalatonne Y,Richardi J,Pileni M P.Van der Waals versus dipolar forces controlling mesoscopic organizations of magnetic nanocrystals[J].Nature Materials,2004,3(2):121-125.
[18] Kershi R M,Ali F M,Sayed M A.Influence of rare earth ion substitutions on the structural,optical,transport,dielectric,and magnetic properties of superparamagnetic iron oxide nanoparticles[J].Journal of Advanced Ceramics,2018,7:218-228.
[19] Shi X,Liu Z,Li X,et al.Enhanced dielectric polarization from disorder-engineered Fe3O4@black TiO2-x heterostructure for broadband microwave absorption[J].Chemical Engineering Journal,2021,419:130020.
[20] Yang W,Sun J,Liu D,et al.Rational design of hierarchical structure of carbon@polyaniline composite with enhanced microwave absorption properties[J].Carbon,2022,194:114-126.
基金资助
山西省基础研究计划青年科学研究项目(20210302124048)
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