Synthesis The Performances Of Ni-Zn Ferrite Films By Spin-spray Plating Method

The main purpose of this dissertation is to prepare Ni-Zn ferrite film by spin-sprayed plating method, using FeCl₂·4H₂O, NiCl₂·6H₂O, ZnCl₂ as the basic stuff of the reducing solution, using NaNO₂, CH₃COONH₄ as the basic stuff of the oxidizing solution, spraying liquor to the surface of glass substrate to prepare to get Ni-Zn ferrite film under the reaction temperature at 90℃. And then we compare performances among the different films through changing the factors as the complex compound, PH value, Zn content and Co content, etc., then analyze the performance of the films by the methods of XRD, SEM and VSM , etc.. Consequently we can draw the conclusion how to improve the performances of the films, and make the performances of the films up to the best.Through researching and analysis, we get the following conclusions:The joining of the complex compound is disadvantageous to prepare Ni-Zn ferrite film, because it suppresses the link between surface hydroxyl and metal ions, according to the theory of low temperature wet plating method it goes against Ni-Zn ferrite film formation at that instance.We change the PH value of oxidizing solution by adjusting the concentration of CH₃COONH₄, and we find out we can get higher saturation intensity, lower coercivity and larger complex permeability when the pH value of oxidizing solution is 8.0.Within the specifically limits the saturation magnetization (Ms) of the ferrite films will descend when we use so much nonmagnetic ion Zn2 +. When the content of Zn increases from 0.1 to 0.6, the saturation magnetization (Ms) of films rises firstly and then declines. When the content of Zn is 0.3, the film shows a large saturation magnetization of 147.8 kA/m and low coercivity of 2.489kA/m.When the content of Co is 0.03, the film is dense and uniform. The real part of complex permeabilityμ′achieves the maximum value 72.5 about at a frequency of 1.7GHz. While the imaginary part of complex permeabilityμ″at the maximum of 107.5 at about 2 GHz of the frequency.