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空心陶瓷微球表面化學鍍鈷工藝及電磁性能研究
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Hollow Ceramic Microsphere Coated with Co by Electroless Plating and Its Electromagnetic Properties
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    摘要:

    采用化學鍍工藝，在粒徑為1~20 μm空心陶瓷微球表面包覆了一層金屬Co。先以Sn-Pd溶液作為活化劑，將空心微球表面進行活化，再采用以次亞磷酸鈉為還原劑的堿性鍍液使其表面沉積上金屬Co。使用X射線能譜儀（EDX）和場發(fā)射掃描電子顯微鏡（FESEM）對包覆結(jié)果進行表征，通過優(yōu)化確定出最佳化學鍍液配方。用網(wǎng)絡矢量分析儀對包覆了Co的空心微球的電磁參數(shù)進行了測量。結(jié)果表明：經(jīng)過化學鍍的空心微球表面包覆了一層致密，均勻的金屬鍍層，得到的功能化空心微球在2~18 GHz的頻率范圍內(nèi)具有較高的介電常數(shù)，具有一定的微波吸收性能

    Abstract:

    Functional microspheres with size of 1-20 μm were produced by plating Co on hollow ceramic microspheres for the application of lightweight microwave absorbers. Using Sn-Pd solution as active agent, the surface of hollow microspheres was activated. Co plating was carried out in an alkaline bath with sodium hypophosphite as a reducing agent. The coating of Co was characterized by field-emission scanning electron microscopy (FESEM) and energy-dispersive X-ray spectroscopy (EDX). The electromagnetic properties were improved by adjusting the molar ratio of main salt to complexing agent and the concentration of the main salt in a certain range. Furthermore, the processing conditions such as pH value and plating temperature were optimized. Due to the conductive and ferromagnetic behavior of Co coating which is dense and uniform, high dielectric constant can be obtained in the microwave frequency range of 2-18 GHz and the functional hollow micorsphere has certain microwave absorption performance

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肇 研,張 桐,張 潤,陳吉平,段躍新.空心陶瓷微球表面化學鍍鈷工藝及電磁性能研究[J].稀有金屬材料與工程,2010,39(4):587~592.[Zhao Yan, Zhang Tong, Zhang Run, Chen Jiping, Duan Yuexin. Hollow Ceramic Microsphere Coated with Co by Electroless Plating and Its Electromagnetic Properties[J]. Rare Metal Materials and Engineering,2010,39(4):587~592.]
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  • 收稿日期:2009-06-11
  • 最后修改日期:2010-03-16
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