NiZn series ferrite material and preparing method thereof

Abstract

The present invention relates to ferrite material of NiZn and method for manufacturing, and belongs to manufacturing technology field of ferrite material. The main constituent is calculated by oxide with molar percentage: 48.5-52.5mol% Fe2O3,25-33mol%ZnO,0.5-8.0mol%CuO, allowance being NiO; doping agent is calculated by oxide with molar percentage 0.001-0.15wt%CaO, 0.01-0.12wt% MoO3, 0.01-0.08wt%Bi2O3, 0.01-0.20wt%Nb2O5, 0.01-0.20wt% SnO2, 0.01-0.16wt%V2O5. The beneficial effect of the present invention is, first, improving power density, implementing miniaturization; second, improving reliability of electric system.

Description

technical field [0001] The technology belongs to the technical field of ferrite material preparation. Background technique [0002] Soft ferrite materials are important supporting materials for the electronic information industry. Especially with the development trend of high frequency, miniaturization and integration of electronic equipment, the application fields of soft ferrite materials continue to expand and become a Basic and irreplaceable electronic functional materials. Soft ferrite materials are mainly divided into two categories - MnZn series and NiZn series. MnZn series materials are mainly used in frequency bands below MHz, while NiZn series materials are mainly used in radio frequency microwave bands above MHz. In recent years, with the development of industries such as information highway, broadband transmission technology, portable PDA, and flat-panel display technology, the demand for NiZn materials used in frequency bands above MHz has continued to rise, a...

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Problems solved by technology

[0003] In recent years, famous companies and R&D institutions in developed countries have attached great importance to the research and development of high-performance NiZn ferrite materials, such as TDK, FDK, Hitachi, Sony, Young Hwa in Korea, Ferroxcube, Epcos, Thomson in Europe, GE in the United States, etc. In response to the development needs of the electronic information industry, new materials are constantly introduced; domestic companies such as Zhejiang DMEGC, Tiantong Electronics, Guangdong East Sunshine, Nanjing Jinning and other companies are also tracking and researching NiZn-based ferrite materials that adapt to this change in demand. However, the main problems of the current domestic NiZn ferrite materials are as follows: 1) The saturation magnetic induction Bs is about 250mT (25°C) when the magnetic permeability of the material reaches more than 1500, and the Curie temperature Tc is about 100°C, which satisfies 2) If the saturation magnetic induction Bs is increased to 380mT (25°C), the Curie temperature Tc is about 170°C, and the material permeability is reduced to Below 800, it cannot meet the requirements of miniaturization of electronic equipment (especially flat display system)

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