Low-loss iron-nickel soft magnetic powder and method of production

By forming a modified epoxy resin insulating layer on the surface of iron-nickel powder, the problems of easy damage and unevenness of the insulating layer of existing soft magnetic powder at high temperature are solved, and low-loss and high-performance soft magnetic powder is realized.

CN115985614BActive Publication Date: 2026-07-21QINHUANGDAO YAHAO NEW MATERIAL TECH CO LTD
View PDF 2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QINHUANGDAO YAHAO NEW MATERIAL TECH CO LTD
Filing Date
2022-12-09
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

The insulating layer of existing soft magnetic powder is easily damaged or unevenly coated at high temperatures, leading to high losses and decreased magnetic permeability.

Method used

Modified epoxy resin is used as an insulating agent. An insulating coating layer is formed on the surface of iron-nickel powder. The modified epoxy resin is synthesized with other raw materials using POSS-centered terminal hydroxyl monomers. Combined with a curing agent, an organic/inorganic hybrid material is formed, which improves the thermal stability and uniformity of the insulating layer.

Benefits of technology

The resistivity of the material was improved, the high-frequency eddy current loss was reduced, the resistance to DC superposition was enhanced, the product performance was stable, and the loss was reduced.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The application discloses a kind of low-loss iron-nickel soft magnetic powder and preparation method, belong to magnetic functional material technical field, preparation method includes the following steps: first step, passivation treatment: after iron-nickel powder is pretreated with phosphoric acid, ethanol is mixed, zirconium oxide ball is added, ball milling is carried out, ball milling time is 30-40min, after baking to dry, obtain phosphating magnetic powder;Second step, preparation insulating agent: modified epoxy resin and curing agent are mixed to obtain insulating agent;Insulating coating: insulating agent and acetone are mixed, then phosphating magnetic powder is added, ultrasonic dispersion is 15-20min, at temperature 80 DEG C under baking 50-60min, obtain a kind of low-loss iron-nickel soft magnetic powder.The application is handled in the self-made insulating agent to iron-nickel powder, forms insulating coating on the surface of iron-nickel powder, and is made into a kind of low-loss iron-nickel soft magnetic powder, to improve the resistivity of material as a whole, and product performance is stable.
Need to check novelty before this filing date? Find Prior Art