Curing method of nanocrystalline magnetic core

Abstract

The invention discloses a curing method of a nanocrystalline magnetic core, and belongs to the technical field of magnetic core material preparation. The method comprises the following steps: firstly,mixing 40-60 parts of polyurethane modified epoxy resin, 15-30 parts of bisphenol A epoxy acrylate, 8-15 parts of dipropylene glycol diacrylate, 2-4 parts of 1-hydroxycyclohexyl phenyl ketone, 0.2-1part of an antifoaming agent, 0.3-1.5 parts of a wetting agent and 0.5-1.5 parts of a leveling agent, and uniformly stirring to form a glue solution; then, soaking the nanocrystalline magnetic core subjected to heat treatment in the glue solution, wherein the soaking time is 30-60s; and finally, airing the impregnated magnetic core till that there is no residual glue solution on a surface, and then curing the impregnated magnetic core through a UV photocuring instrument, wherein a curing temperature ranges from 25 DEG C to 30 DEG C, and the curing time ranges from 5s to 15s. The method is easyto operate and low in cost, a stress borne by the cured magnetic core can be greatly reduced, and the cured magnetic core can keep good performance.

Description

technical field

[0001] The invention relates to a curing method for a nanocrystalline magnetic core, belonging to the technical field of magnetic core material preparation. Background technique

[0002] Nanocrystalline magnetic cores are generally made of nanocrystalline alloy strips after winding and heat treatment, and are often used to make magnetic heads, transformers, choke coils, high-efficiency motors, reactors, etc. Nanocrystalline alloy strips begin to become brittle due to structural relaxation and other reasons during heat treatment, and their toughness is poor. When subjected to external forces, the magnetic core is brittle, and the soft magnetic properties decrease accordingly, which seriously affects the subsequent application of the magnetic core. In order to solve the problem of poor toughness and brittleness of the magnetic core, the heat-treated nanocrystalline magnetic core is generally dipped and cured first, and then put into a protective box of a corres...