Effect Of A Magnetic Field On Self-propagating High-temperature Synthesis Of Nickel-Zinc

Nickel-Zinc ferrites is characterized by high electric resistivity, low core loss and low temperature coefficient of permeability. So it is used in electronic device suited for high-frequency application in the telecommunication field.Self-propagating high temperature synthesis method is invented by Merzhanov, etal.(Institute of Structure Macrokinetics, Russia).Compared with conventional methods, self-propagating high-temperature synthesis in energy and timesaving, highly productive, ecologically clean, Which products are highly pure and have stable properties. SHS method is suitable for industrial production. In recent years SHS has attracted the attention on the preparation of ferrite, The SHS on preparation of ferrite is mature relatively, and the performance requirements have become more sophisticated.Ni0.4Zn0.6Fe2O4 soft ferrite has been prepared by SHS in this paper.It studied the content of iron changes impact on the product. The results indicate that when the mol percent of iron is 60%, the productions of powders and cycle samples have the best magnetic properties. Ni1-xZnxFe2O4 soft ferrite is also synthesized by SHS. It discuss the percent of ZnO impact on Ni-Zn ferrite performance. The research shows that with the increasing of the value of y the Hc of product first decrease and then increase, it is minimum when x =0.65, the Ms of product first increased and then decreased gradually, it is maximum when x =0.65.Ni0.4Zn0.6Fe2O4 is synthesized by SHS under the conditions of the external magnetic field, it found that it has little influence on the combustion process and the magnetic properties of product because of small magnetic field. Ni0.3Zn0.7Fe2O4 is synthesized by SHS with the conditions of increasing magnetic field , discovered increases the magnetic field has enhancement to combustion temperature and velocity of combustion, all increases along with the magnetic field increases. The magnetic property has also improvement, the values of coercive force increases along with the magnetic field reduces. the values of Ms increase with the increasing of the magnetic field strength.Ni0.6Zn0.4Fe2O4 is synthesized by SHS with the conditions of increasing magnetic field, and research the magnetic field and reversing magnetic field influence on product magnetic function. The research indicated that, it can effective reduce Hc and increase Ms , but the magnetic field is being more advantageous to the magnetism property improvement.