Preparation method of carbonyl iron powder based rust-proof powder for producing integrally-formed inductor

A carbonyl iron powder and powder technology are applied in the field of preparing carbonyl iron powder antirust powder for producing integrally formed inductors, which can solve the problems of easy rusting of integrally formed inductors, prolong production cycle, increase production processes, etc., and achieve excellent salt resistance. The effect of fog performance, improving production efficiency and reducing production cost

Active Publication Date: 2020-04-24
深圳市艺感科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the carbonyl iron powder purchased in the existing market is prepared into powder and used for the production of integrated inductors, the integrated inductors are prone to rust, and additional spraying treatment (usually painting) is required on the surface of the product to prevent rust, which increases The production process prolongs the production cycle and reduces production efficiency

Method used

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preparation example Construction

[0019] The invention provides a preparation method for producing carbonyl iron powder antirust powder for integrally formed inductors, comprising the following steps: performing phosphating treatment on carbonyl iron powder in advance, and phosphating treatment is a passivation treatment that can increase carbonyl iron powder Excellent insulation performance and anti-oxidation performance; pre-dilute the special insulation treatment agent with acetone, and dilute it into a special insulation treatment agent solution. The special insulation treatment agent can form a strong insulation layer on the surface of carbonyl iron powder particles, greatly improving the insulation of the particle surface strength; pre-dissolve epoxy resin and silicone resin with acetone to form a glue solution; pre-dilute the film-forming agent with acetone to form a film-forming agent solution. The film-forming agent can make the film on the surface of carbonyl iron powder particles The strength is grea...

Embodiment 1

[0030] Dilute 1g of phosphoric acid in 50g of acetone, mix well and add to 1000g of carbonyl iron powder, stir well, dry in the air, bake at 60°C for 1 hour, and the phosphating is complete. Dissolve 10g of epoxy resin and 10g of silicone resin in 50g of acetone successively, dissolve evenly and add to the phosphating powder, stir evenly for 20 minutes to form a slurry; then take 2g of special insulating treatment agent and dissolve in 10g of acetone, After fully dissolving, continue to add to the above slurry, and stir evenly for 5 minutes; then take 2g of film-forming agent and dissolve it in 10g of acetone, continue to add to the above slurry after fully dissolving, and stir evenly for 5 minutes. Then granulate, dry in the air, bake at 100°C for 2 hours, add 1g of zinc stearate after natural cooling, stir evenly and sieve, take 40-300 mesh as good product granules. Then the good product particles are pressed into 24*14*7 magnetic rings, molded under 25Mpa pressure, cured at...

Embodiment 2

[0035] Take 5g of phosphoric acid and dilute it in 75g of acetone, mix it evenly, add it to 1000g of carbonyl iron powder, stir it evenly, dry it in the air, bake it at 70°C for 1.5 hours, and the phosphating is completed. Take 20g of epoxy resin and 20g of silicone resin and dissolve them in 75g of acetone successively. After dissolving evenly, add them to the phosphating powder and stir evenly for 30 minutes to form a slurry; then take 2.5g of special insulating treatment agent and dissolve them in 20g of acetone , continue to add to the above slurry after fully dissolving, and stir evenly for 10 minutes; then take 2.5g of film-forming agent and dissolve it in 20g of acetone, continue to add to the above slurry after fully dissolving, and stir evenly for 10 minutes. Then granulate, dry in the air, bake at 90°C for 2 hours, add 2.5g of zinc stearate after natural cooling, stir evenly and sieve, take 40-300 mesh as good product granules. Then the good product particles are pre...

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PUM

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Abstract

The invention discloses a preparation method of carbonyl iron powder based rust-proof powder for producing an integrally-formed inductor. The preparation method comprises the following steps: phosphating carbonyl iron powder; dissolving epoxy resin and organic silicon resin into a glue solution by using acetone; diluting a special insulation treating agent with acetone; diluting a film-forming agent with acetone; and adding the glue solution into the phosphatized carbonyl iron powder and stirring into slurry, adding a special insulation treating agent solution and continuing stirring to a uniform state, adding a film-forming agent solution and continuing stirring to a uniform state, carrying out granulating, airing and drying the particles, then adding zinc stearate and carrying out stirring to a uniform state, and carrying out sieving and screening to obtain the carbonyl iron powder based rust-proof powder. By adding the special insulation treating agent and the film-forming agent, ahigh-insulation adhesive film with considerable strength is formed on the surfaces of carbonyl iron powder particles, environmental erosion can be effectively resisted, the product directly achieves an anti-rust effect, the production cycle can be shortened, the production efficiency can be improved, and the production cost can be reduced.

Description

technical field [0001] The invention belongs to the technical field of passive electronic components manufacturing, and in particular relates to a preparation method of carbonyl iron powder antirust powder for producing integrally formed inductors. Background technique [0002] At present, when the one-piece inductor is produced, the electrically connected coil and electrode terminal are first put into the production mold, and then the powder prepared by carbonyl iron powder is filled and compacted by cold pressing with the upper and lower punches to form a As a whole, it is cured at high temperature and has the advantages of strong anti-electromagnetic interference, small size, high current, and low power consumption. [0003] When the carbonyl iron powder purchased in the existing market is prepared into powder and used for the production of integrated inductors, the integrated inductors are prone to rust, and additional spraying treatment (usually painting) is required on...

Claims

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Application Information

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IPC IPC(8): H01F41/02H01F41/00
CPCH01F41/00H01F41/0246
Inventor 田林武卫锋
Owner 深圳市艺感科技有限公司
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