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2006 , Vol. 21 >Issue 4: 797 - 802

DOI: https://doi.org/10.3724/SP.J.1077.2006.00797

研究论文

化学镀制备Ni包覆纳米SiC核壳颗粒及其介电响应

  • 邹桂真 ,
  • 曹茂盛 ,
  • 张亮 ,
  • 金海波宿辉 ,
  • 王正平
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  • 1. 北京理工大学材料科学与工程学院, 北京 100081;
    2. 哈尔滨工程大学材料科学与工程系, 哈尔滨 150001

收稿日期: 2005-07-04

  修回日期: 2005-08-31

  网络出版日期: 2006-07-20

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Preparation and Dielectric Enhancement of Nickel-coated β-SiC Nanoparticles

  • ZOU Gui-Zhen ,
  • CAO Mao-Sheng ,
  • ZHANG Liang ,
  • JIN Hai-Bo ,
  • XU Hui
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  • 1. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;
    2. Department of Materials Science and Engineering, Harbin Engineering University, Harbin 150001, China

Received date: 2005-07-04

  Revised date: 2005-08-31

  Online published: 2006-07-20

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摘要

摘要: 采用简单的化学镀方法, 在相对低的温度下制备了具有核-壳结构的SiC-Ni纳米复合颗粒. XRD和TEM分析结果表明,纳米Ni晶吸附在SiC颗粒表面, 可以形成一层连续且致密的Ni包覆层. 基于化学镀和催化理论, 初步分析了化学镀核壳结构形成机理. 利用波导法研究了纳米SiC颗粒和复合颗粒在8～12GHz的微波介电特性. 研究结果表明, 复合颗粒的介电常数实部(ε')和介电损耗角正切值(tanδ=ε''/ε')都明显增强, 并给出相应的理论模型.

关键词： 化学镀; SiC; SiC-Ni核壳结构; 介电性能

本文引用格式

邹桂真 , 曹茂盛 , 张亮 , 金海波宿辉 , 王正平 . 化学镀制备Ni包覆纳米SiC核壳颗粒及其介电响应[J]. 无机材料学报, 2006 , 21(4) : 797 -802 . DOI: 10.3724/SP.J.1077.2006.00797

Abstract

A nanoscale core-shell structure of β-SiC P-Ni was prepared at lower temperature by a simple and convenient electroless plating approach. The core-shell nanoparticles were characterized by means of XRD and TEM. The results show that β-SiC nanoparticles (β-SiC P) are coated by a uniform and continuous nickel
shell. The mechanism based on the theory of electroless plating and palladium
catalysis was discussed in details about core-shell structure of β-SiC P-Ni. Dielectric permittivities of the original silicon carbide nanoparticles (β-SiC P) and nickel-coated β-SiC P in paraffin wax were measured respectively in the GHz frequency range from 8 to 12GHz. The real part and dielectric loss tangent of the nickel-coated β-SiC P were significantly enhanced. The origin of the enhancement was discussed in theory, and also explained by discussing the change of surface electrical conduction behavior of β-SiC P and nickel-coated β-SiC P.

Key words： electroless plating; SiC; core-shell structure of silicon carbide and nickel; dielectric property

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