Preparation and microwave absorption properties of Ni–B alloy-coated Fe₃O₄ particles

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• 作者：Xueai Li ; Xijiang Han ; Yanjiang Tan ; Ping Xu
• 关键词：Amorphous alloy ; Electromagnetic properties ; Microwave absorbing materials ; Electroless plating
• 刊名：Journal of Alloys and Compounds
• 出版年：2008
• 出版时间：22 September 2008
• 年：2008
• 卷：464
• 期：1-2
• 页码：352-356
• 全文大小：811 K

文摘

The Fe₃O₄ particles that were activated with Pd-Sn catalytic nuclei by single-step activation were used as cores for obtaining nickel- and boron-decorated particles with shell/core structure via electroless plating. The materials were characterized by TEM, SEM, EDX, X-ray diffraction, VSM and microwave network analyzer. The results showed that Fe₃O₄ particles coated with Ni–B alloy films had reduced metal deposition in the reaction solution. There was no peak of amorphous alloy Ni–B by XRD but the inverse spinal Fe₃O₄. The calculated results indicate that the Fe₃O₄ densely coated with Ni–B exhibits better absorption performance than the pure Fe₃O₄ in the range of 2–18 GHz, such as more powerful absorbing capability and a wider electromagnetic wave absorbing frequency band.