Release Time:2022-06-28  Hits:

Date of Publication: 2005-01-01

Journal: 功能材料

Institution: 材料科学与工程学院

Issue: 4

Page Number: 519-521

ISSN: 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.

Note: 新增回溯数据