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共沉淀过程中镍锌添加比例对两步法制备的Ni0.5Zn0.5Fe2O4吸波性能的影响 预览

Effect of proportion of nickel and zinc in coprecipitationmethod on absorption property of Ni0.5Zn0.5Fe2O4 prepared by two steps
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摘要 采用共沉淀法和溶胶-凝胶法制备了纳米Ni0.5Zn0.5Fe2O4粉体。通过X射线衍射(XRD)、原子力显微镜(AFM)、矢量网络分析(VNA)等方法对4种不同添加比例的样品进行微观结构和电磁性能表征。结果表明:通过650℃煅烧,在4种添加比例下都得到了纯Ni0.5Zn0.5Fe2O4。制备的Ni0.5Zn0.5Fe2O4为球形,随着共沉淀过程中添加比例的增加,粒径先减小后增大,添加比例为60%时粒径最小,平均粒径约为44nm。在2~12.4GHz时,材料厚度越大,Ni0.5Zn0.5Fe2O4有效吸波频带越接近低频波段,且最大吸波强度达到-24.94dB。当添加比例为60%时,Ni0.5Zn0.5Fe2O4有效吸波频段为5.0~9.9GHz,有效吸波频带最宽,微波吸收性能最佳。 Nano Ni0.5Zn0.5Fe2O4 powders were prepared by the coprecipitation method combined with sol-gel method.The microstructure and electromagnetic performance of the as-prepared four kinds of Ni0.5Zn0.5Fe2O4 samples with different addition proportion were characterized by X-ray diffraction,atomic force microscope(AFM),vector network analysis(VNA).The results show that the pure Ni0.5Zn0.5Fe2O4 is gained in each proportion under 650℃calcination.The Ni0.5Zn0.5Fe2O4 particles are spherical,with the increase of adding proportion in coprecipitation process,particle size decreases first and then increases,the particles have the minimum size while the proportion is 60%,the average size is around 44nm.In the range of 2-12.4GHz,the greater the thickness of the material,the closer the effective absorption band of Ni0.5Zn0.5Fe2O4 is to the low frequency band,the maximum absorbing intensity of Ni0.5Zn0.5Fe2O4 can reach-24.94dB.While the proportion is 60%,the effective absorption band of Ni0.5Zn0.5Fe2O4 is 5.0-9.9GHz,the bandwith reaches maximum,and microwave absorption property is the best.
作者 毕松 汤进 王鑫 侯根良 李军 刘朝辉 苏勋家 BI Song;TANG Jin;WANG Xin;HOU Gen-liang;LI Jun;LIU Chao-hui;SU Xun-jia(Rocket Force University of Engineering,Xi’an 710025,China;Rocket Force Equipment Research Institute,Beijing 100085,China;Xi’an Luck New Materials Co. ,Ltd. ,Xi’an 710038,China)
出处 《材料工程》 EI CAS CSCD 北大核心 2019年第4期91-96,共6页 Journal of Materials Engineering
基金 国家自然科学基金项目(51502341,51302312).
关键词 NI0.5ZN0.5FE2O4 共沉淀法 溶胶-凝胶法 微波吸收性能 Ni0.5Zn0.5Fe2O4 coprecipitation method sol-gel method microwave absorption property
作者简介 通讯作者:毕松(1981-),男,副教授,硕士生导师,主要从事军用新材料的研究与制备等方面的研究工作,联系地址:陕西省西安市灞桥区洪庆街道同心路2号火箭军工程大学作战保障学院(710025),E-mail: xiaozhu-youyou@163.com.
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