Preparation and microwave properties of Ni hollow fiber by electroless plating-template method Refe
Abstract
Nickel-coated silk composites (Ni/silk fiber) were prepared by electroless nickel-plating using a kind of natural silk as template in first stage.The silk templates were then removed to get Ni hollow fiber by annealing the Ni/silk fiber at 220 °C for 2 h in air or 700 °C for 1.5 h in nitrogen.The prepared Ni/silk fiber and Ni hollow fiber were characterized by X-ray diffraction (XRD),scanning electron microscope (SEM),field emission scanning electron microscope (FE-SEM) and differential thermal analysis and thermogravimetric analysis (TG-DTA).The values of complex permittivity,complex permeability,dielectric and magnetic loss of Ni/silk fiber and Ni hollow fiber were measured in the frequency range of 2–18 GHz by a reflection/transmission approach using a network analyzer.The results indicate that the dielectric loss of Ni/silk fiber and Ni hollow fiber is high up to 1 even at 18 GHz while the magnetic loss is low.
Keywords:Metals and alloys; Chemical synthesis; Dielectric response; Magnetisation; Scanning electron microscopy帮忙翻一下