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Tape-casting method of aluminum oxide ceramics

A technology for tape casting of alumina ceramics, applied in ceramic molding machines, auxiliary molding equipment, manufacturing tools, etc., can solve problems such as uneven density of tape casting, achieve reduced processing allowance, uniform drying, and improved pass rate Effect

Inactive Publication Date: 2018-04-13
HUNAN ZHENGYANG PRECISION CERAMIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to propose a new alumina ceramic tape casting method for the problems existing in the existing alumina ceramic tape casting process, which can effectively eliminate the problems of alumina ceramic tape casting. Problems of cracking and uneven density during molding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method of making alumina ceramics by tape casting technology, mixing alumina ceramic powder with dispersant, binder and plasticizer in a solvent to form a uniform and stable suspended slurry; then passing the slurry through a casting machine The material flows from the lower part of the hopper to the base belt, and the base film is formed by the relative movement of the base belt and the scraper. The thickness of the base film is controlled by the scraper; The agent forms a network structure between the ceramic particles, forming a green sheet with a certain strength and flexibility, and the dried green sheet is rolled together with the base tape for use; the residual solvent is evenly distributed during the storage process, and the humidity gradient is eliminated; then it can be used as required Shape cutting, punching or punching; finally degreasing and sintering to get the finished product; its characteristic is that when the blank film and the base belt are sent to...

Embodiment 2

[0042] The principle of the second embodiment is the same as that of the first embodiment, except that the mold materials and slurry parameters adopted are a little different. For a method of making alumina ceramics by tape casting technology, firstly, the alumina ceramics used to make alumina ceramics The powder raw material is ball milled, and then mixed with the additives for making alumina ceramics. After mixing and stirring, the second wet grinding is carried out again to obtain the premixed slurry, and then the ground premixed slurry and the organic plasticizer solution are mixed according to the appropriate amount. Proportional mixing to make a mixed slurry with a certain viscosity, and the third grinding of the mixed slurry to obtain a casting slurry, and vacuum defoaming treatment for the casting slurry; then let the casting slurry flow into the container In the alumina ceramic mold, use a scraper to scrape and coat the alumina ceramic mold with the thickness of the al...

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Abstract

A method for tape casting of alumina ceramics, mixing alumina ceramic powder with dispersant, binder and plasticizer in a solvent to form a uniform and stable suspended slurry; then passing the slurry from a hopper through a casting machine The lower part flows to the base belt to form a blank film; then the blank film and the base belt are sent to the drying room for drying, and the solvent is evaporated to form a green sheet with a certain strength and flexibility; then it can be cut and punched according to the required shape sheet or perforated; finally, the finished product is obtained through degreasing and sintering; when the blank film and the base belt are sent to the drying room for drying, a protective atmosphere is introduced into the drying room to reduce the drying speed of the upper surface of the blank film belt; and in alumina ceramics The powder is mixed with the dispersant, binder and plasticizer in the solvent to increase the solid phase content of the alumina powder in the casting slurry, reduce the solvent content, and make the green body easier to dry; at the same time, a slow drying rate is used in the formula And the solvent with low boiling point, fast drying speed and high boiling point makes the green body dry more uniformly.

Description

technical field [0001] The present invention relates to a production method of alumina ceramics, in particular to a tape casting method of alumina ceramics. The problem of cracking and poor uniformity is mainly used for the production and processing of alumina ceramic substrates, and belongs to the technical field of alumina ceramic production. Background technique [0002] Alumina ceramics is a ceramic material mainly composed of alumina (Al2O3), which is used in thick film integrated circuits. Alumina ceramics have good conductivity, mechanical strength and high temperature resistance. It should be noted that ultrasonic cleaning is required. Alumina ceramics are a kind of ceramics with a wide range of uses. Because of its superior performance, it has been more and more widely used in modern society, meeting the needs of daily use and special performance. [0003] The molding methods of alumina ceramic products include dry pressing, grouting, extrusion, cold isostatic pr...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/622B28B1/29B28B17/02
CPCC04B35/10B28B1/29B28B17/026C04B35/622
Inventor 王有才李楷张振环
Owner HUNAN ZHENGYANG PRECISION CERAMIC
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