Rear-earth ferrite magnetic core material used for transformer

A ferrite core and transformer technology, which is applied in the field of oxide magnetic material manufacturing to achieve the effects of high grain boundary resistivity, strong mechanical properties and high magnetic energy product

Active Publication Date: 2014-09-17
铜陵常江传动工具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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Embodiment 1

[0022] A rare-earth ferrite core material for transformers, characterized in that it includes main materials and additives, the main materials include: 61.4 mol of Fe2O3, 16.7 mol of manganese oxide, 14.2 mol of zinc oxide according to the molar ratio , 1 mol of copper oxide, 0.6 mol of calcium sulfate, 0.02 mol of rare earth composite magnetically conductive powder; the additives include: 50ppm of chromium oxide and 1000ppm of zinc borate according to the weight ratio of the ferrite core material;

[0023] The preparation of the rare earth composite magnetically permeable powder comprises the following steps:

[0024] Preparation of master mix:

[0025] The premixed solution is composed of the following raw materials in parts by weight: bone glue 10, iron oxide 50, oleic acid 3, fatty alcohol polyoxyethylene ether 2;

[0026] Add bone glue to 30 times water, stir and disperse at 80°C for 2 hours, grind iron oxide to a fineness of 60 μm and add, add oleic acid and fatty alcoh...

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Abstract

The invention discloses a rear-earth ferrite magnetic core material used for a transformer. The rear-earth ferrite magnetic core material comprises main ingredients and additives, wherein the main ingredients comprise the following components in molar ratio: 61.4-70 mol of Fe2O3, 16.7-20 mol of manganese oxide, 10-14.2 mol of zinc oxide, 1-2 mol of copper oxide, 0.4-0.6 mol of calcium sulfate and 0.01-0.02 mol of rear-earth composite magnetic powder; the additives comprise the following components in proportion by weight (based on the ferrite magnetic core material): 40-50 ppm of chromic oxide and 800-1000 ppm of zinc borate. The rear-earth composite magnetic powder added in the ferrite magnetic core material disclosed by the invention is high in magnetic energy product, stable in magnetism and simple in preparation method; a finished product has characteristics of high crystal boundary resistivity, low porosity, great and uniform crystalline grain.

Description

[0001] technical field [0002] The invention mainly relates to the field of manufacture of oxide magnetic materials, in particular to a rare-earth ferrite core material used for transformers. Background technique [0003] 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 electrical equipment. The existing magnetic cores are difficult to meet the above requirements; [0004] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 李新满
Owner 铜陵常江传动工具有限公司
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