Preparation method of MgZn ferrite products

A technology of ferrite and products, which is applied in the field of preparation of soft ferrite products, can solve the problems of increased manufacturing cost, long production cycle, one more ball milling, etc., and achieve the effect of low product cost, low cost and saving raw materials

Active Publication Date: 2013-01-02
CHENGDU GUOGUANG ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing soft ferrite preparation technology can meet the performance requirements of the product, it has the following disadvantages: (1) the materials are all new materials, and the cost is high; (2) the production cycle is relatively long: one more ball mill, Powder pre-burning and secondary ball milling process
Increased manufacturing costs of the final product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Crush the waste injection molded ferrite magnetic ring products to a particle size of 5-15 μm, according to the basic formula: recover MgZn ferrite material 73-76wt%, Fe 2 o 3 15~18wt%, ZnO 4~6wt%, MgO 2~5wt%, MnCO 3 0.3~1.0wt%, CuO 0.8~1.5wt%, Bi 2 o 3 0.3 ~ 0.8wt% to prepare 100kg of raw materials. Grind the prepared raw materials into powder; then spray and granulate the ground powder: first add water to the sand mill, put the ground powder into it, and control the solid content (solid content = powder weight *100% / (water weight + powder weight)) between 55~65wt%, sanding for 3 hours, adding 17~20wt% PVA glue during sanding, when the particle size of sanding powder is less than 1.0μm, Carry out spray granulation; after granulation, add zinc stearate (0.3-0.5wt% of powder weight) to the powder to facilitate molding, and now press the magnetic ring with an outer diameter of 12mm, a height of 20mm, and an inner diameter of 5.6mm. The unit weight is 8.22g, the out...

Embodiment 2

[0029] Waste full-band magnetic antenna ferrite products, crushed to a particle size of 5-15 μm, according to the basic formula: recycle MgZn ferrite material 77.3-80wt%, Fe 2 o 3 6~9wt%, ZnO 6~8wt%, MgO 4.5~7.5wt%, CaCO 3 0.2~0.8wt%, SiO 2 0.2~1.0wt%, CuO 0.6~1.5wt%, Bi 2 o 3 0.1~0.5wt% to prepare 100kg of raw materials. Grind the prepared raw materials into powder; then spray and granulate the ground powder: first add water to the sand mill, put the ground powder into it, and control the solid content (solid content = powder weight *100% / (water weight + powder weight)) between 55~65wt%, sanding for 3 hours, adding 17~20wt% PVA glue during sanding, when the particle size of sanding powder is less than 1.0μm, Carry out spray granulation; after granulation, add zinc stearate (0.3-0.5wt% of powder weight) to the powder to facilitate molding, and now press the magnetic ring with an outer diameter of 12mm, a height of 20mm, and an inner diameter of 5.6mm. The unit weight...

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Abstract

The invention discloses a preparation method of MgZn ferrite products, which comprises the following steps: crushing recycled MgZn ferrite into magnetic powders and then mixing with ferric oxide, zinc oxide, magnesium oxide and additives to prepare raw materials; grinding the raw materials into powders; performing spray granulation process: adding water into a sand mill and then adding the grinded powders, controlling the solid content to be 55-65wt%, sanding for 3 hours, adding 17-20wt % of PVA (polyvinyl alcohol) glue in the sanding process, performing the spray granulation when the granularity of the sanded powder is smaller than 1.0 mum; adding zinc stearate into the granulated powder, pressing and molding to prepare semi-finished products, and then sintering the semi-finished products for 3-4 hours in a high-temperature furnace at 1260-1310 DEG C to obtain the products. The method is low in cost, suitable for recycling and short in production period; the prepared MgZn ferrite products are characterized by high magnetic conductivity and frequency impedance selectivity; and the method is widely applied to manufacturing the MgZn ferrite products.

Description

technical field [0001] The invention relates to a method for preparing a soft magnetic ferrite product, in particular to a method for manufacturing a MgZn ferrite product. Background technique [0002] Soft ferrite has a wide range of uses. From the performance point of view, it can be divided into high μ materials, high magnetic flux density Bs materials, radio wave absorbers and other materials. When the radio wave absorber material works above the cut-off frequency, its loss will increase sharply. Using this characteristic can be used to absorb electromagnetic wave energy, and it is widely used in anti-electromagnetic interference electronic technology. MgZn ferrite is a commonly used radio wave absorbing material in soft magnetic ferrite. The usual preparation process of MgZn ferrite is as follows: (1) prepare raw materials, (2) ball mill and mix the prepared raw materials evenly, ( 3) Powder pre-burning, (4) secondary ball milling, (5) sanding granulation, (6) product ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622H01F1/36
Inventor 周本洪薛立彬周喜平郑负零高华英夏晓明
Owner CHENGDU GUOGUANG ELECTRIC
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