Anti-interference and high-voltage-resistant magnetic core material and preparation method thereof

Abstract

The invention relates to an anti-interference and high-voltage-resistant magnetic core material, which comprises the following raw materials in parts by weight: 66-68 parts of ferric oxide, 16.5-17.5 parts of zinc oxide, 4.5-5.5 parts of copper oxide, 5-6 parts of magnesium oxide, 3-4 parts of nickel oxide and 1.5-2.5 parts of manganous-manganic oxide. When in use, the high-voltage-resistant capacity of the magnetic core prepared by the materials mentioned above is improved by more than 50%, the insulation resistance is stably higher than 100 M[omega], the weldable temperature (soldering) is improved by 15%, and the anti-interference and high-voltage-resistant characteristics and stability of the magnetic core can be effectively improved by adopting the proportion of the components in the scheme.

Description

technical field [0001] The invention relates to the technical field of oxidized magnetic materials, in particular to an anti-interference and high-voltage-resistant magnetic core material and a preparation method thereof. Background technique [0002] Ferrite is widely used in magnetic cores and circuit boards. The ratio of ferrite materials plays a decisive role in the mechanical properties of molded parts. Taking the magnetic core as an example, the magnetic core made of existing materials on the market The withstand voltage can only reach 2000V, so it cannot meet the requirements for use in ultra-high voltage circuits. Secondly, its insulation resistance is generally 50MΩ-100MΩ. This index is very unstable and is extremely dangerous in ultra-high voltage transmission. In addition, its The soldering tin temperature is only plus or minus 10% of 410°C, and after the magnetic core is soldered at high temperature, since the magnetic core is a poor conductor of heat, it is pron...

AI Technical Summary

Problems solved by technology

[0002] Ferrite is widely used in magnetic cores and circuit boards. The ratio of ferrite materials plays a decisive role in the mechanical properties of molded parts. Taking the magnetic core as an example, the magnetic core made of existing materials on the market The withstand voltage can only reach 2000V, so it cannot meet the requirements for use in ultra-high voltage circuits. Secondly, its insulation resistance is generally 50MΩ-100MΩ. This index is very unstable and is extremely dangerous in ultra-high voltage transmission. In addition, its The soldering tin temperature is only plus or minus 10% of 410°C, and after the magnetic core is soldered at high temperature, since the magnetic core is a poor conductor of heat, it is prone to microcracks, and the magnetic core made of the existing magnetic core material ratio , the secondary sintering cannot be performed, that is, the magnetic core cannot be preheated, so the temperature of the solder joint produced by the tin bar is much higher than that of the magnetic core during soldering, so problems such as cracks are prone to occur