Ni-Zn soft magnetic ferrite material and preparation method thereof

Abstract

The invention discloses a nickel-zinc soft magnetic ferrite material and a preparation method thereof. The material comprises the following compositions in mol percentage: 45 to 50 mol percent of ferric oxide Fe2O3, 20 to 26 mol percent of zinc oxide ZnO, 12 to 17 mol percent of nickel protoxide NiO, 5 to 10 mol percent of copper oxide CuO, and 3 to 10 mol percent of magnesium oxide MgO. The preparation method comprises the following steps: treating raw materials, proportioning, primary ball milling, drying, powdering or screening, preburning, secondary proportioning, secondary ball milling, secondary drying and secondary powdering or screening; the preburning condition is to carry out pre-synthesis in an air furnace at a temperature of between 900 and 980 DEG C, and the sintering temperature is between 1,050 and 1,100 DEG C. The nickel-zinc soft magnetic ferrite material has the characteristics of property of high Q, high frequency, high TC, high Bm and low cost.

Description

technical field [0001] The invention relates to a soft ferrite material and a preparation method thereof, in particular to a nickel-zinc soft ferrite material and a preparation method thereof. Background technique [0002] With the technological upgrading and development of high-tech products such as laptop computers, digital products, LCD TVs, and micro-communications, the demand for nickel-zinc soft ferrite cores is increasing, and tends to be miniaturized, with high reliability and low The direction of production cost development requires stable magnetic permeability, TC, Bm, anti-demolition strength, and high Q, and the nickel-zinc soft ferrite core mainly uses nickelous oxide precious metal as the main raw material, and the addition amount is 10% ~25%. At the same time, as a rare and precious metal, nickel plays an important role in military industry, national defense, and aerospace. It is a strategic resource. Many countries have adopted restrictions on quantitative mi...

AI Technical Summary

Problems solved by technology

[0002] With the technological upgrading and development of high-tech products such as laptop computers, digital products, LCD TVs, and micro-communications, the demand for nickel-zinc soft ferrite cores is increasing, and tends to be miniaturized, with high reliability and low The direction of production cost development requires stable magnetic permeability, TC, Bm, anti-demolition strength, and high Q, and the nickel-zinc soft ferrite core mainly uses nickelous oxide precious metal as the main raw material, and the addition amount is 10% ~25%. At the same time, as a rare and precious metal, nickel plays an important role in military industry, national defense, and aerospace. It is a strategic resource. Many countries have adopted restrictions on quantitative mining. With the rapid development of the magnetic material industry, nickel The demand is also growing at a high speed, which has caused a tense situation in which the supply of NiO in the entire industry exceeds demand, and the application of the traditional nickel-zinc soft ferrite cores that use a large amount of NiO is limited. Ferrite plays an important role in improving Q value, TC, Bm, high-frequency characteristics, etc. In the case of tight supply of nickel and rising prices, nickel-zinc soft ferrite manufacturers at home and abroad have begun to actively develop alternative or Materials that reduce the amount of nickelous oxide, but according to current market information feedback, due to the failure to solve the technical problems of greatly reducing the Q value, high-frequency characteristics, TC, and Bm after reducing the nickel content, they have not been successfully developed with high Q, High-frequency characteristics, high TC, Bm, low-cost nickel-zinc ferrite new materials, still mainly traditional nickel-zinc materials