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Preparation method of ferrite raw belt

A technology of ferrite raw tape and ferrite powder, which is applied in the field of preparation of ferrite raw tape with water-based system, can solve the problems of difficult control of coating properties of mixtures, difficult filming of products, unfavorable surface control, etc. Achieve convenient rheological properties, convenient and accurate control of coating thickness, and avoid harm to the human body and the environment

Inactive Publication Date: 2015-10-07
重庆市鸿富诚电子新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the actual production process, the solvent method currently used has the following defects: 1) there are organic solvents and plasticizers, and the existence of these organic substances is not only harmful to the environment, but also harmful to the human body; Fast, which is not conducive to surface control; 3) Because it is a one-time mixing and grinding, the coatability of the mixture is not easy to control; 4) Because of the brittleness of the adhesive used in the solvent system, the product is not easy to film when thin coating, and the raw tape Fragile, difficult to better carry out the next operation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 100 g of ferrite powder was put into 0.8 ml of PS-30A water-based dispersant, 30 ml of water was added as a grinding solvent, and the first slurry was obtained after grinding for 10 hours. Add the aqueous polymer emulsion (PS-11A type aqueous self-crosslinking acrylate copolymer emulsion) of 19.6ml in the first slurry, the add-on of aqueous polymer emulsion is between the 6-18wt% of the first slurry, Thoroughly stir for 30 minutes to make it uniform, and adjust the viscosity of the system to 3500cps, so as to obtain the second slurry. The second slurry is coated on a coating device with a temperature set at 10-35° C. to obtain a ferrite green tape with a thickness of 0.23 mm, and all supplies are cleaned with water.

Embodiment 2

[0051] Take 100g of ferrite powder and put it into 1.2ml of PS-30A water-based dispersant, add 30ml of water as a grinding solvent, and grind for 8 hours to obtain the first slurry. Add the aqueous polymer emulsion (PS-11A type aqueous self-crosslinking acrylate copolymer emulsion) of 19.7ml in the first slurry, the add-on of aqueous polymer emulsion is between the 6-18wt% of the first slurry, Thoroughly stir for 30 minutes to make it uniform, and adjust the viscosity of the system to 3500cps, so as to obtain the second slurry. The second slurry is coated on a coating device with a temperature set at 10-35° C. to obtain a ferrite green tape with a thickness of 0.23 mm, and all supplies are cleaned with water.

Embodiment 3

[0053] 100 g of ferrite powder was put into 1.6 ml of PS-30A water-based dispersant, 30 ml of water was added as a grinding solvent, and the first slurry was obtained after grinding for 12 hours. Add the aqueous polymer emulsion (PS-11A type aqueous self-crosslinking acrylate copolymer emulsion) of 19.7ml in the first slurry, the add-on of aqueous polymer emulsion is between the 6-18wt% of the first slurry, Fully stir for 30-40 minutes to make it uniform, and adjust the viscosity of the system to 4000cps, so as to obtain the second slurry. The second slurry was coated on a coating device with a temperature set at 20° C. to obtain a ferrite green tape with a thickness of 0.23 mm, and all supplies were cleaned with water.

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PUM

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Abstract

The invention provides a preparation method of a ferrite raw belt. The preparation method comprises the following steps of: adding water into ferrite powder as a grinding solvent, adding water-based polymer emulsion, mixing into slurry for coating and preparing and obtaining the ferrite raw belt. The preparation method provided by the invention has the advantages that the water is used as the grinding solvent, is non-corrosive, good in heat transferring and convenient for cleaning, so that the environment-friendly effect is embodied and the hazards of the solvent to a human body and the environment and the waste of the solvent are avoided; simultaneously, flexible water-based polymer emulsion is used, so that the safety of the production environment is improved, and the coating procedure is easier for adjustment; the prepared raw belt has better toughness, so that the waste is reduced.

Description

technical field [0001] The invention relates to a method for preparing a ferrite raw tape, in particular to a method for preparing a ferrite raw tape with an aqueous system. Background technique [0002] As a ferromagnetic metal oxide, ferrite has high resistivity and good dielectric properties. At the present stage, the preparation of ferrite raw tape generally adopts the solvent method, that is, the solid adhesive is dissolved with a solvent, and then various plasticizers are assisted, and then mixed with ferrite powder, and ground, after a period of time, Coating is then carried out to prepare a raw belt product. [0003] The raw tape is used for sintering electronic ceramic sheets, and is used for light weight and miniaturization of electronic devices after sintering. The quality of the raw tape directly affects the quality of the final product. At present, there are many types of ferrite powder, and the ferrite powder involved in the present invention is mainly nickel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 陈大全杨涛孙爱祥
Owner 重庆市鸿富诚电子新材料有限公司