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Inorganic insulating adhesive for soft magentic metal powder core andits prepn process

An inorganic insulation and metal soft magnetic technology, applied in the field of metal powder alloys, can solve problems such as performance degradation and aging of powder cores

Inactive Publication Date: 2007-12-19
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The invention provides a soft magnetic powder core of an all-inorganic system, which solves the problem of powder core aging and performance decline due to heat generation during use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: The Fe-Ni-Mo magnetic powder obtained by water atomization method is mixed according to the particle size; wherein the particle size is -150+250 mesh powder 35%wt, -250+325 mesh powder 30%wt, -400 mesh powder 35%, the metal magnetic powder with the above particle size ratio is mixed, and then the surface of the metal magnetic powder is passivated. The passivation treatment solution is a mixed solution of potassium dichromate and potassium phosphate. The concentration of the solution is 8 grams of mixed solid salt of dichromate and phosphate per kilogram of metal powder, and the mixed solution is poured into deionized water heated to 80 ° C. , Stir until completely dissolved, then add the metal magnetic powder into the completely dissolved mixed solution, and heat to 80-100°C, then rinse and dry, so that the surface of the metal magnetic powder reacts and forms an oxide film insulating layer. Prepare inorganic insulating adhesive for metal soft magnetic powder c...

Embodiment 2

[0026] Example 2: The Fe-Si-Al powder prepared by the gas atomization method is mixed according to the particle size; wherein the particle size-150+250 mesh powder 30%wt,-250+325 mesh powder 35%wt,-400 mesh powder 35%wt %, the metal magnetic powder with the above particle size ratio is mixed, and then the surface of the metal powder is passivated. The passivation treatment solution is a mixed solution of potassium dichromate and phosphoric acid. The concentration of the solution is 12 grams of potassium dichromate and 0.5 ml of phosphoric acid per kilogram of metal powder. The mixed solution is placed in deionized water heated to 80 ° C and stirred until All dissolved, then add the metal magnetic powder into the completely dissolved mixed solution, and heat to 80-100°C, then rinse and dry, so that the surface of the metal magnetic powder reacts and forms an oxide film insulation layer. Prepare inorganic insulating adhesive for metal soft magnetic powder core according to the f...

Embodiment 3

[0030] Example 3: The Fe3Cu68Mn2Nb2Si12B13 amorphous thin ribbon obtained by the quick quenching method was crystallized under the protection of nitrogen, the treatment temperature was 460°C, and the treatment time was 30 minutes. The crystallized thin strips were pulverized in a ball mushroom machine, and the ball milling time was 24 hours to obtain amorphous and nanocrystalline magnetic powder. After grading the amorphous and nanocrystalline magnetic powder, mix the powder according to the particle size, among which -150+250 mesh powder is 26%wt, -250+325 mesh powder is 34%wt, and -400 mesh powder is 40%. Crystal and nano crystal powder are mixed, and then the surface passivation treatment is carried out on the metal powder. The passivation treatment solution is a mixed solution of potassium dichromate and phosphoric acid. The concentration of the solution is 9 grams of potassium dichromate and 0.6 ml of phosphoric acid per kilogram of metal powder. The mixed solution is pla...

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Abstract

The present invention provides one kind of inorganic insulating adhesive for soft magnetic metal powder core. The inorganic insulating adhesive consists of SiO2, Al2O3, ZrO2, mica powder and water mixed together, and possesses both insulating and adhering functions. The present invention also provides the method of using the inorganic insulating adhesive in preparing soft magnetic metal powder core. Using the inorganic insulating adhesive can result in high magnetic performance of the magnetic metal powder core and enhanced mechanical strength, and the soft magnetic powder core without organic matter contained has no ageing and performance degradation caused by heat.

Description

technical field [0001] The invention belongs to the field of metal powder alloys, and in particular relates to an inorganic insulating adhesive for a metal soft magnetic powder core without organic matter, and a method for preparing the metal soft magnetic powder core by using the inorganic insulating adhesive. Background technique [0002] The metal soft magnetic powder core is obtained by mixing soft magnetic alloy powder with insulating agent and binder uniformly, pressing and molding, and heat-treating. At present, metal magnetic powder cores mainly include iron powder cores, iron-nickel alloy powder cores, iron-nickel-molybdenum alloy powder cores, iron-silicon aluminum alloy powder cores, and FeCuNbSiB series amorphous nanocrystalline powder cores developed in recent years. Metal soft magnetic powder cores are the key components for making inductors, especially inductive devices in high-frequency, high-current and high-power circuits. The main parameters that reflect ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J1/00H01F1/22C04B35/64B22F3/02
Inventor 张洪平赵栋梁高立春王新林洪兴刘钢侯春福
Owner CENT IRON & STEEL RES INST
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