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Curtain casting preparation method of ceramic film sheet for electronic device

A technology of electronic components and ceramic diaphragms, which is applied in the field of casting preparation of ceramic diaphragms for electronic components, and can solve problems such as easy clumping of casting slurry, difficulty in casting and cracking of casting machines

Inactive Publication Date: 2008-07-30
黄荣厦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific surface of ultra-fine ceramic powder is relatively large, and the casting slurry prepared by the existing method is easy to clump, and it is difficult to cast on the casting machine, and even if it can be made into a green film, it often causes serious cracking , very low yield

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] A casting method for preparing a ceramic diaphragm for electronic components, comprising the following steps:

[0019] (1) Get 99.65 grams of alumina powder with a purity of 99.9%, a particle size of 0.3-0.5 microns and 0.35 grams of basic magnesium carbonate powder with a particle size of 0.5-1 microns to form a powder, and add 2.5 grams of Ammonium polyacrylate, then add ball mill and deionized water in a weight ratio of 1:2:1.3, put it into a ball mill and mill it for 10 hours, take it out and undergo ultrasonic porosization treatment for 0.5 hour, and then dry it;

[0020] (2) Get 100 grams of powder after step (1) treatment, add 25 grams of polyacrylic acid, 1.5 grams of polyethylene oxide, and 32 grams of deionized water, and put it into a ball mill for ball milling for 24 hours;

[0021] (3) Stir the slurry after ball milling in step (2) in a vacuum environment for 0.5-1 hour, remove air bubbles, then add ammonia water to adjust the pH value of the slurry to 7-9,...

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PUM

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Abstract

The flow casting process of preparing ceramic film for electronic element and device includes the following steps: 1. mixing superfine ceramic powder, crystal grain inhibitor powder, dispersant and water, ball milling, ultrasonically forming pores and stoving; 2. adding solvent, adhesive and water, and ball milling to form slurry; 3. defoaming the slurry, and regulating the viscosity to 10000-30000 centipoise; 4. flow casting the slurry and stoving to form ceramic film biscuit; and 5. sandwiching the biscuit in isolating board and sintering. The said process can prepare ceramic film with high density and high smoothness.

Description

technical field [0001] The invention relates to a casting preparation method of ceramic diaphragms for electronic components. Background technique [0002] In electronic components, ceramic insulating substrates, ceramic substrates, dielectric layers or protective layer ceramic films are usually prepared by tape casting. The usual process is as follows: ceramic powder, sintering agent, solvent, auxiliary agent, etc. Firing into shape. For example, the invention patent with announcement number (announcement date, patent number 98103410, application date) provides a tape-casting preparation process for ceramic substrates. [0003] The ceramic diaphragm made of ultra-fine ceramic powder (particle size smaller than micron) has high density, good surface finish and excellent performance. However, the specific surface of the ultrafine ceramic powder is relatively large, and the casting slurry prepared by the existing method is easy to clump, and it is difficult to cast on the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/622C04B35/626C04B35/10
Inventor 黄荣厦
Owner 黄荣厦