Preparation method of high thermal conductive insulating soft magnetic metal powder and soft magnetic metal powder
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A soft magnetic metal and metal powder technology, applied in the manufacture of inductors/transformers/magnets, inorganic material magnetism, electrical components, etc. Thermal conductivity, improving insulation properties and thermal conductivity, and the effect of simple and easy methods
Inactive Publication Date: 2019-02-12
HEFEI ECRIEE TAMURA ELECTRIC
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is: the thermal conductivity and insulation of the soft magnetic metal powder prepared by the existing soft magnetic metal powder preparation method are not good
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Embodiment 1
[0024] (1) Weigh nano-boron nitride, nano-aluminum nitride, nano-silicon nitride, sodium silicate, nano-zirconia by mass ratio 5: 3: 2: 4: 3 as coating agent raw materials, and the coating agent raw materials Add distilled water, stir at a speed of 45rad / s to dissolve it, and obtain an insulating coating solution with a mass concentration of 34g / L;
[0025] (2) take by weighing carbonyl iron powder and add above-mentioned solution, heating reaction while stirring, after the reaction finishes, water is evaporated to dryness to obtain insulating powder; In this step, the quality of carbonyl iron powder is 6 times of distilled water quality, and stirring speed is 50rad / s, the reaction temperature was 115 °C;
[0026] (3) Take epoxy resin, phenolic resin, thermally conductive epoxy resin filler, and triethylenetetramine as glue material in a mass ratio of 3:2:1.2:1, and dissolve the glue material in acetone to obtain an adhesive. The ratio of the total mass of the glue material ...
Embodiment 2
[0040] (1) Weigh nano-boron nitride, nano-aluminum nitride, nano-silicon nitride, sodium silicate, nano-zirconia by mass ratio 5: 3: 2: 4: 3 as coating agent raw materials, and the coating agent raw materials Add distilled water, stir at a speed of 30rad / s to dissolve it, and obtain an insulating coating solution with a mass concentration of 50g / L;
[0041] (2) take iron-silicon-chromium alloy powder by weighing and add above-mentioned solution, heating reaction while stirring, after the reaction finishes, water is evaporated to dryness to obtain insulating powder; In this step, the quality of iron-silicon-chromium alloy powder is 6 times of distilled water quality, and stirring speed is 45rad / s, and the reaction temperature is 120℃;
[0042] (3) Take epoxy resin, phenolic resin, thermally conductive epoxy resin filler, and triethylenetetramine as glue material in a mass ratio of 3:2:1.2:1, and dissolve the glue material in acetone to obtain an adhesive. The ratio of the tota...
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Abstract
The invention discloses a preparation method of high thermal conductive insulating soft magnetic metal powder. The method comprises the following steps that (1) an insulating coating solution is prepared, wherein a coating agent is weighed according to a proportion, the coating agent comprises nano boron nitride, nano aluminum nitride, nano silicon nitride, sodium silicate and nano zirconia, the coating agent is added into distilled water, stirred and dissolved to obtain the insulating coating solution, and the mass concentration of the insulating coating solution is 30-50 g/L; (2) the insulating coating solution obtained in step (1) is adopted to coat metal powder to prepare insulating powder; (3) an adhesive is prepared; (4) the soft magnetic metal powder is prepared. The invention alsoprovides the high thermal conductive insulating soft magnetic metal powder prepared by the method. The preparation method of the high thermal conductive insulating soft magnetic metal powder and the high thermal conductive insulating soft magnetic metal powder have the advantages that through the preparation of composite coating film, not only is the soft magnetic powder uniformly coated, but alsothe insulation property and thermal conductivity of the powder are greatly improved, the method is simple and feasible easily, and the method is very suitable for industrial production.
Description
technical field [0001] The invention belongs to the field of magnetic functional materials, and particularly relates to a preparation method of a soft magnetic metal powder with high thermal conductivity and high insulation properties and the soft magnetic metal powder. Background technique [0002] Magnetic materials are widely used in electronic and electrical products and are one of the foundations of the material industry. It has special functions such as energy conversion and storage. Compared with traditional laminated rigid magnetic cores, soft magnetic composites obtained by coating insulating films on the surface of ferromagnetic particles have a series of unique properties, such as three-dimensional isotropic magnetic properties, extremely low eddy current loss, flexible magnetic properties It is precisely because of the existence of these characteristics that soft magnetic composite materials have broad application prospects. [0003] The coating of the insulati...
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