A method of manufacturing a ferromagnetic core containing cao

Abstract

The invention discloses a CaO-containing ferromagnetic core manufacturing method, which comprises the following steps of: proportioning 72-75 parts of reduced iron powder by weight, 13-15 parts of oxidized iron powder by weight, 2.5-4.5 parts of MnO by weight, 3-4 parts of ZnO by weight, 1.5-2.5 parts of modified nano carbon by weight, 1.8-2.8 parts of boric oxide by weight, 2.3-2.8 parts of CaO by weight, 2.5-4 parts of SnO2 by weight, 3.7-4.3 parts of V2O5 by weight and 3.3-3.8 parts of Fe3O4 by weight, and then sequentially conducting pre-sintering, primary ball milling, secondary ball milling, molding and sintering to obtain a CaO-containing ferromagnetic core. The CaO-containing ferromagnetic core manufacturing method has the advantages that the magnetic core formula is reasonable, the preparation method is simple, the saturation induction density of the manufactured magnetic core is higher, the loss is lower, the temperature resistance is higher, the added modified nano carbon and the boric oxide can take a bridge bonding effect among different raw materials, the distribution of the used raw materials is better, the density is high, the crystal boundary resistivity is high, the porosity is low, the grains are large and uniform, the cracks are prevented from occurring during sintering, the texture is compact, the deformation is small, the raw material formula is reasonably improved, the deformation degree is small during sintering, and the magnetic core can be wire-cut, cut, ground and the like.

Description

technical field [0001] The invention belongs to powder metallurgy technology, in particular to a method for manufacturing a ferromagnetic core containing CaO. Background technique [0002] The saturation magnetic induction of the iron powder magnetic core is generally about 9000-11000 Gauss, and the iron loss is very large in the alternating electric field of 100-2000 Hz. The saturation magnetic induction of sendust core is generally about 5000-9000 Gauss, and the iron loss is relatively low, but the mechanical strength of its material is too low; the saturation magnetic induction of ferrite is about 2700-4200 Gauss, and the iron loss is quite good , but the saturation magnetic induction is too low, and it is not suitable for cutting. Contents of the invention [0003] In order to alleviate the deficiencies and defects of the prior art, the object of the present invention is to provide a method for manufacturing a ferromagnetic core containing CaO. [0004] In order to a...

AI Technical Summary

Problems solved by technology

The saturation magnetic induction of sendust core is generally about 5000-9000 Gauss, and the iron loss is relatively low, but the mechanical strength of its material is too low; the saturation magnetic induction of ferrite is about 2700-4200 Gauss, and the iron loss is quite good , but the saturation magnetic induction is too low, and it is not suitable for cutting