Preparation and dielectric enhancement of nickel-coated β-SiC nanoparticles
Journal Title: Science Paper Online - Year 2007, Vol 2, Issue 5
Abstract
A nanoscale core-shell structure of β-SiCP-Ni has been prepared at lower temperature by a simple and convenient electroless plating approach. The core-shell nanoparticles have been characterized by means of XRD and TEM. The results show that β-SiC nanoparticles (β-SiCP) are coated by a uniform and continuous nickel shell. The mechanism based on the theory of electroless plating and palladium catalysis has been discussed in details about core-shell structure of β-SiCP-Ni. Dielectric permittivities of the original silicon carbide nanoparticles (β-SiCP) and nickel-coated β-SiCP in paraffin wax are measured respectively in the GHz frequency range from 8 to 12 GHz. The real part and dielectric loss tangent of the nickel-coated β-SiCP are significantly enhanced. The origin of the enhancement is theoretically discussed, and also explained by the change of surface electrical conduction behavior of β-SiCP and nickel-coated β-SiCP.
Authors and Affiliations
Guizhen Zou, Maosheng Cao, Yuqing Kang
Keywords
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