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Date of Publication:2005-01-01

Journal:功能材料

Affiliation of Author(s):材料科学与工程学院

Issue:4

Page Number:519-521

ISSN No.:1001-9731

Abstract:Nanometer Ni particles have been obtained by DC arc plasma in methane gas and in a mixture of H2 and Ar gas atmosphere respectively. The distinct characterization and morphology of the layers on two kinds of Ni particle surfaces were investigated by X-ray photoelectron spectroscopy (XPS) and transmission electron spectroscopy (TEM). It was observed that a carbon-rich and an oxide of Ni2O3 layers were formed on the surface of Ni particles obtained in methane gas, and in a mixture of H2 and Ar gas atmosphere, respectively. The electricity conductivity of paint made by filling two kinds of nanometer Ni particle was investigated respectively. Complex permeability �� and complex permittivity �� of two kinds of Ni particle gas were measured by Agilent 8722ES microwave network analyzer in 2-18 GHz band. The experimental results show that the microwave electromagnetic characteristic of Ni particle covered with carbon-rich layer was better than that of Ni particle covered with Ni2O3 layer.

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