Method for drying gel injection moulding blank

A drying method and gel injection molding technology, which is applied in the drying field of gel injection molding blanks, can solve problems such as difficult to prepare shape and structural parts, easy to produce density gradients, easy to crack or deform, etc., to reduce investment and dry shrinkage Consistent, productive results

Inactive Publication Date: 2009-07-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional ceramic molding technology has exposed many problems in the molding and preparation of precision ceramic parts: the uneven density of the ceramic body prepared by dry molding makes the performance of each part inconsistent, and it is difficult to prepare structural parts with complex shapes by dry molding ; Large-scale structural components prepared by traditional wet forming techniques such as slip casting a...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: ethanol aqueous solution drying flaky Al 2 o 3 Ceramic gel casting body

[0021] Al flakes prepared by gel-casting technique 2 o 3 The ceramic green body (100×100×1mm in size), soaked in a pre-configured dry solvent (ethanol solution, ethanol volume content is 50%) for 2 hours, took it out and let it stand in the air for 3 hours, the alumina ceramics The flakes are completely dried.

Embodiment 2

[0022] Embodiment 2: absolute ethanol drying rod-shaped Al 2 o 3 Ceramic gel casting body

[0023] Rod-shaped Al prepared by gel-casting technique 2 o 3 The ceramic body (with a size of ф10×100mm) was soaked in the dry solvent absolute ethanol for 6 hours, taken out and left in a drying oven at 40°C for 3 hours, and the rod-shaped alumina ceramic body was completely dried.

Embodiment 3

[0024] Embodiment 3: acetone drying bulk ZrO 2 Ceramic gel casting body

[0025] Block ZrO prepared by gel injection molding technique 2 The ceramic body (size 100×100×20mm) is soaked in dry solvent acetone (acetone aqueous solution, acetone volume content is 10%) for 3 hours, then taken out, replaced with dry solvent acetone and then soaked for 3 hours, repeating this 3 times , and finally take it out and put it in a dry oven at 40°C for 8 hours, the block gel injection molded ZrO 2 The ceramic body is completely dried.

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PUM

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Abstract

The invention discloses a drying method for a gel mold-injection blank, which employs the characteristics of certain low-boiling organic matters capable of being mutually dissolved with water and with surface tension lower than that of the water to dip the gel mold-injection blank into the organic matter or the mixture of the organic matter and the water to lead the water in the blank to be replaced, thereby drying the blank. The low-boiling organic matters mainly comprise: the alcohols of low molecular weights like methanol, ethanol, and propanol, the ketones of low molecular weights like ketone, ketol, and acetone, the ethers of low molecular weights like methyl ether, and aether, as well as the aldehydes of low molecular weights like formaldehyde, acetaldehyde, and propionaldehyde. The drying method for the gel mold-injection blank is simple to be operated and has high efficiency; the dried blank does not have chaps or other drying defects; the surface quality is good; moreover, the energy consumption is small and the cost is low; the invention is suitable for industrial production.

Description

technical field [0001] The invention relates to a method for drying a gel casting body. Background technique [0002] Ceramic materials have a series of excellent mechanical properties and chemical stability such as high strength, high hardness, high temperature resistance, wear resistance and corrosion resistance. ground application. Therefore, the precision molding and preparation technology of various high-performance ceramic material structural components is becoming more and more important. However, the traditional ceramic molding technology has exposed many problems in the molding and preparation of precision ceramic parts: the uneven density of the ceramic body prepared by dry molding makes the performance of each part inconsistent, and it is difficult to prepare structural parts with complex shapes by dry molding ; Large-scale structural components prepared by traditional wet forming techniques such as slip casting are prone to density gradients inside, and are pro...

Claims

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Application Information

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IPC IPC(8): C04B35/624
Inventor 王日初王小锋
Owner CENT SOUTH UNIV
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