Cr2O3-containing ferromagnetic core manufacturing method
A manufacturing method and ferromagnetic core technology, applied in the manufacture of inductors/transformers/magnets, the magnetism of inorganic materials, electrical components, etc., can solve the problems of low saturation magnetic induction intensity, unsuitable for cutting, low mechanical strength of materials, etc., and achieve a small degree of deformation , low porosity and small deformation
Active Publication Date: 2013-03-20
TIANCHANG CITY ZHAOTIAN MAGNETOELECTRICITY TECH
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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
Method used
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Experimental program
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Embodiment 1
[0013] Example 1: Containing Cr 2 o 3 The manufacture method of the ferromagnetic core, comprises the following steps:
[0014] (1) The ratio of raw materials is calculated in parts by weight (catties), reduced iron powder 68, iron oxide powder 15, MnO 3, ZnO 4, modified ferric oxide powder 3, Cr 2 o 3 4.2, SiO 2 2. CaCO 3 1.8, Al 2 o 3 2.5, CuO 4.3, the modified ferric oxide powder is prepared by the following method: modified iron ferric oxide powder: adopt ferric ferric oxide and add nano-carbon equivalent to 0.3-0.5% of its weight, and disperse at a high speed. Dry and pulverize into 280-300 mesh powder to obtain modified ferric oxide;
[0015] (2) Calcination: Add water and dispersant to ball mill the raw materials except modified ferroferric oxide powder for 2-3 hours, then spray dry and pre-calcine. 1.5-2 hours;
[0016] (3) Secondary ball milling: add water and dispersant to the primary ball milling material, carry out secondary ball milling for 1-2 h...
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The invention discloses a Cr2O3-containing ferromagnetic core manufacturing method, which comprises the following steps of: proportioning 66-70 parts of reduced iron powder by weight, 14-16 parts of oxidized iron powder by weight, 2-4 parts of MnO by weight, 3.5-4.5 parts of ZnO by weight, 2.5-3.5 parts of modified Fe3O4 powder by weight, 3.8-4.5 parts of Cr2O3 by weight, 1.7-2.3 parts of SiO2 by weight, 1.5-2 parts of CaCO3 by weight, 2-3 parts of Al2O3 by weight and 4-4.5 parts of CuO by weight, and then sequentially conducting pre-sintering, primary ball milling, secondary ball milling, molding and sintering to obtain a Cr2O3-containing ferromagnetic core. The Cr2O3-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 Fe3O4 powder 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 o 3 The method of manufacturing the ferromagnetic core. 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 2 o 3 The method of manufacturing the ferromagnetic core. [0004] In order to achie...
Claims
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Login to View More 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