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

doi:10.3724/SP.J.1077.2006.00797

Abstract

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

CLC Number:

TB333

ZOU Gui-Zhen,CAO Mao-Sheng,ZHANG Liang,JIN Hai-Bo,XU Hui,WANG Zheng-Ping. Preparation and Dielectric Enhancement of Nickel-coated β-SiC Nanoparticles[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2006.00797.

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