Soft magnetic ferrite material containing magnesium, nickel and zinc element as well as manufacturing method thereof

Abstract

The invention discloses a soft magnetic ferrite material containing magnesium element, nickel element and zinc element, which comprises the following compositions in mol portion: 60 to 66 mol percent of ferric oxide Fe2O3, 7 to 10 mol percent of nickel oxide NiO, 7 to 10 mol percent of magnesia MgO, 10 to 15 mol percent of zinc oxide ZnO and 3 to 6 mol percent of copper oxide CuO. The manufacturing method comprises the following steps of the processing of raw material, batching, primary ball milling, drying, pulverization or sifting, preburning, secondary batching, secondary ball milling, secondary drying and secondary pulverization or sifting, in a preburning condition, the soft magnetic ferrite material is presynthesized in an air furnace at a temperature of between 800 and 900 DEG C. The prepared soft magnetic ferrite material has the initial magnetic conductivity of about 100, stable magnetic performance and low production cost when the soft magnetic ferrite material is used to produce a laminated sheet type inductor.

Description

technical field [0001] The invention relates to a soft magnetic ferrite material and a manufacturing method thereof, in particular to a soft magnetic ferrite material applied to multilayer chip inductors and magnetic beads and a manufacturing method thereof. Background technique [0002] At present, almost all the materials used to produce laminated chip inductors (and magnetic beads) at home and abroad are soft magnetic ferrite materials based on NiCuZn, and the more common ones have initial permeability of 25, 50, 100, and 200 respectively. , 300, 400, 600, etc. Among them, those with initial permeability of 25 and 50 are generally used to make inductors and magnetic beads with high frequency of use, such as spiked magnetic beads; initial permeability of 200, 300, 400 , 600 are often used to make large inductance chip inductors with relatively low frequency of use; while materials with an initial magnetic permeability of about 100 are often used to make conventional produc...

AI Technical Summary

Problems solved by technology

However, the use of NiCuZn to produce various chip inductors and magnetic beads also has the following disadvantages: With the rapid rise in the prices of various non-ferrous metals and their oxides in recent years, especially the rise in nickel prices, the use of μ100 materials with high nickel content The manufacturing cost has become higher and higher

MgZn materials, NiZn and MnZn materials belong to the soft ferrite series. MgZn materials have been used to make magnetic cores for a long time, but they have not been able to replace NiZn materials in the field of chip inductor production. This is because: MgZn materials are compatible with NiZn materials. Compared with the following disadvantages: higher sintering temperature, lower self-resonant frequency, lower density of ceramic body after sintering, lower mechanical strength of the ceramic body, etc., it is difficult to meet the requirements of chip inductor production