The Study Of NiZn Ferrite Materials And Their Ion-Substituted Materials

Today, with the development of information technology, the demand and development of electronic devices in information area are paid much attention. How to meet these requirements of high standard and permeability has became a focus in electronic information. The increase of permeability is attitude to two respects, one is the optimal design of electronic circuits, the other is increase the permeability of information materials. Hence, based on optimal design of electronic circuits, the advance of material permeability is a key way to solve the problem. NiZn ferrite material is one of important based materials to make electronic devices such as inductance and filter. NiZn ferrite has spinel structure(AB2O4) and is a multi-element metal oxide composite compound, which always make an important position in electronic area. About the application of NiZn ferrite, there are powder ferrite and inductance, and NiZn ferrite and its derived materials play the huge roles in these application.In this paper, first, we prepared Ni0.5Zn0.5Fe2O4 ferrite material by traditional solid state method, and investigated the influence on grain growth, microstructure, magnetic properties and Q by different sintered temperatures. The result showed the maximum saturation magnetization Ms reached 57.4 emu/g and the coercivity Hc reached the minimum value of 15.4 Oe. The magnetic permeability increased with sintered temperature increasing, and the Q decreased. Based on NiZn ferrite material, we prepared La-substituted and Ga-substituted NiZn ferrite. Using La3+ and Ga3+ substituted Fe3+ in NiZn ferrite, we studied the influence on structure and properties by substituted content and discussed substituted machination.Based on above experiment, the composite both ferrite material and dielectric materials was been synthesized. By mean of different ratio, we investigated the changes of magnetic properties and dielectric properties of NiCuZn/BaTiO3, and got magneto-electric dual performance by ferroelectric and ferromagnetic materials. Last, we studied the LTCC technology of the composite and lowered temperature sinter NiZn ferrite and its derived materials, and improved the performance of the materials sintered process and system.