Preparation and dielectric enhancement of nickel-coated beta-SiC nanoparticles

作者：Zou Gui Zhen^*; Cao Mao Sheng; Zhang Liang; Jin Hai Bo; Xu Hui; Wang Zheng Ping

来源：Journal of Inorganic Materials, 2006, 21(4): 797-802.

• electroless plating
• SiC
• core-shell structure of silicon carbide and nickel
• dielectric property

A nanoscale core-shell structure of beta-SiCp-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 beta-SiC nanoparticles (beta-SiCp) 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 beta-SiCp-Ni. Dielectric permittivities of the original silicon carbide nanoparticles (beta-SiCp) and nickel-coated beta-SiCp 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 beta-SiCp 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 beta-SiCp and nickel-coated beta-SiCp.

• 出版日期2006-7
• 单位哈尔滨工程大学; 北京理工大学