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Method for producing niobium-enriched ferromagnetic core

A production method, ferroniobium technology, applied in the direction of magnetism of inorganic materials, to achieve the effect of uniform crystal grains, less cracking, and stable electromagnetic properties

Inactive Publication Date: 2014-05-21
ANHUI TAIDE ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now the electronic communication industry needs ferrite cores with low core loss and high magnetic permeability to meet the miniaturization and high efficiency requirements of current electrical equipment, and the existing magnetic cores are difficult to meet the above requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: the manufacture method of niobium-rich ferromagnetic core, comprises the following steps:

[0014] (1) Pre-fired mixture: the molar amount of mixture A is Fe 2 o 3 75mol, ZnO 20mol, magnesium oxide 0.18mol, graphite 0.14mol, phosphorus pentoxide 0.08mol, niobium 0.24mol, aluminum oxide 0.30mol and alum 0.30mol; mixture B is equivalent to the following ratio of the total weight of mixture A Component: 220ppm Co 2 o 3 , 435ppm CuO, 115ppm ReO 2 , 70ppm ruthenium oxide, 85ppm Pd, 180ppm V and 170ppm scandium; Accurately weigh mixture A and mixture B respectively, use the mixing tank to mix separately, stir and mix under 5500 rpm for 1.0-1.5 hours, and then send Put it into a rotary kiln for pre-burning, control the temperature at 370°C, and the pre-burning time is 2-3 hours to obtain pre-fired mixture A and mixture B;

[0015] (2) Grinding: Send the mixtures A and B pre-fired in step (1) to the grinding tank for grinding respectively. The grinding medium...

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PUM

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Abstract

The invention discloses a method for producing a niobium-enriched ferromagnetic core. The method comprises the following steps of: preburning mixtures, wherein the components of the mixture A includes Fe2O3, ZnO, manganese oxide, graphite, phosphorus pentoxide, niobium, aluminium oxide and white alum; and the components of the mixture B comprises Co2O3, CuO, ReO2, ruthenium oxide, Pd, V and scandium according to the ratio equivalent to the total weight of the mixture A; then preparing the niobium-enriched ferromagnetic core by the processes of grinding, mixed pulping, spray drying of powder, pressing and sintering green bodies orderly. The initial magnetic conductivity of the produced product is 22000 by optimizing the formula design and sintering technology; cracks of the sintered product are reduced; the qualified rate can be up to over 93.5%; the produced product has the characteristics of high grain boundary resistivity, low porosity, large and even grain size, excellent impedance characteristic in a high-frequency range, and stable electromagnetic property; a magnetic core product is suitable for each electronic field.

Description

technical field [0001] The invention relates to the field of manufacturing oxide magnetic materials, in particular to a method for manufacturing a ferro-niobium-rich magnetic core. Background technique [0002] With the development of communication technology and digitalization of electronic products, new requirements are put forward for soft ferrite and components. High-performance and high-permeability magnetic cores are widely used in various basic materials for telecommunications and information, such as common-mode filters, Saturated inductors, current transformers, leakage protectors, insulation transformers, signal and pulse transformers and other fields have been widely used. Now the electronic communication industry needs ferrite cores with low core loss and high magnetic permeability to meet the miniaturization and high efficiency requirements of current electrical equipment. The existing magnetic cores are difficult to meet the above requirements. Contents of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/34C04B35/40C04B35/622
Inventor 徐杰杨从会黄国祥刘京州曾性儒张忠仁王玉志
Owner ANHUI TAIDE ELECTRONICS TECH