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HfO2-containing ferromagnetic core manufacturing method

A manufacturing method and ferromagnetic core technology, which are applied in the manufacture of inductors/transformers/magnets, inorganic material magnetism, electrical components, etc., can solve the problems of low mechanical strength of materials, low saturation magnetic induction intensity, unsuitable for cutting, etc. The effect of small deformation and low porosity

Active Publication Date: 2013-03-20
TIANCHANG CITY ZHAOTIAN MAGNETOELECTRICITY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The saturation magnetic induction of the iron powder 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 the sendust core is generally about 5000-9000 Gauss, and the iron loss is relatively high. Low, but its material mechanical strength is too low; the saturation magnetic induction of ferrite is about 2700-4200 Gauss, the iron loss is quite good, but the saturation magnetic induction is too low, and it is not suitable for cutting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Containing HfO 2 The manufacture method of the ferromagnetic core, comprises the following steps:

[0018] (1) The ratio of raw materials is calculated in parts by weight (catties), reduced iron powder 71, iron oxide powder 16, MnO 4.4, ZnO 3.9, modified tree ash 2, nano-carbon 0.6, HfO 2 2. SiO2 2 2.6, V 2 o 5 3.6, CuO 2.5, the modified tree ash is prepared by the following method:

[0019] a. Soak tree ashes with 10% sodium hydroxide solution for 4-5 hours;

[0020] b. Soak in 10% hydrochloric acid solution for 4-5 hours;

[0021] c. Wash with deionized water several times until the tree ash is neutral, then dry;

[0022] d. Grinding to 0.8-1.0 μm powder to obtain modified tree ash;

[0023] (2) Pre-combustion: Add water and dispersant to the raw materials except modified tree ash and nano-carbon for a ball mill for 3-4 hours, then spray dry, and pre-calcine. 3-5 hours;

[0024] (3) Secondary ball milling: add water and dispersant to the prim...

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PUM

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Abstract

The invention discloses a HfO2-containing ferromagnetic core manufacturing method, which comprises the following steps of: proportioning 68-75 parts of reduced iron powder by weight, 15-17 parts of oxidized iron powder by weight, 4.2-4.5 parts of MnO by weight, 3.6-4.2 parts of ZnO by weight, 1.7-2.3 parts of modified tree ash by weight, 0.5-0.7 part of nano carbon by weight, 1-3 parts of HfO2 by weight, 2.5-2.7 parts of SiO2 by weight, 3.4-3.8 parts of V2O5 by weight and 2-3 parts of CuO by weight, and then sequentially conducting pre-sintering, primary ball milling, secondary ball milling, molding and sintering to obtain a HfO2-containing ferromagnetic core. The HfO2-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 tree ash and the nano carbon 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 2 The method of manufacturing the ferromagnetic core. Background technique [0002] The saturation magnetic induction of the iron powder 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 the sendust core is generally about 5000-9000 Gauss, and the iron loss is relatively high. Low, but its material mechanical strength 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 2 The method of manufacturing the ferromagnetic core. [0004] In order to achieve the above objec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/09H01F41/02B22F3/16
Inventor 徐杰杨从会黄国祥刘京州曾性儒张忠仁王玉志
Owner TIANCHANG CITY ZHAOTIAN MAGNETOELECTRICITY TECH
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