Method for net forming of aluminum nitride ceramic

A technology of aluminum nitride ceramics and net shaping, applied in the field of aluminum nitride ceramics net shaping, can solve the problems of unsuitable ceramic powder, poisoning, etc., and achieve the effect of solving the problem of toxicity and solving the problem of easy hydrolysis

Active Publication Date: 2022-03-08
厦门钜瓷科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent "a molding method of ceramic body" (CN 108748611 A), discloses a molding method of pressure grouting, but the method uses water for solvent, and aluminum nitride powder is easily hydrolyzed in water, this method is not suitable for easily hydrolyzed ceramic powder
However, the method uses acrylamide as a monomer, and N'N'-methylenebisacrylamide as a crosslinking agent, and acrylamide and its derivatives have moderate toxicity, especially acrylamide has neurotoxicity, which can be inhaled or caused by Skin absorption of acrylamide vapor can cause poisoning

Method used

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  • Method for net forming of aluminum nitride ceramic
  • Method for net forming of aluminum nitride ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Mixing: Weigh 285g of aluminum nitride powder, 15g of yttrium oxide powder, 20g of ethanol, 10g of ethylene glycol, 45g of N-methylpyrrolidone, 6g of sorbitol glycidyl ether, and 3g of a commercially available dispersant, and perform ball milling for 8 hours;

[0040] Add cross-linking agent: Add 1.8g of tetraethylenepentamine into the ball mill barrel, continue mixing for 20min, take out the ceramic slurry, and then carry out vacuum stirring to defoam;

[0041] Gel-injection molding: pouring the ceramic slurry into the mold for molding;

[0042] Demoulding and drying: place the ceramic body in an oven, dry at 60°C for 24 hours, and then dry at 100°C for 24 hours.

[0043] Degreasing: Put the dried ceramic body in a degreasing furnace to remove organic matter. The degreasing temperature is 500°C and the time is 3 hours;

[0044] Sintering: put the degreased green body into a sintering furnace for sintering, the sintering temperature is 1800°C, and the time is 3h. Plea...

Embodiment 2

[0046] Mixing: Weigh 285g of aluminum nitride powder, 15g of yttrium oxide powder, 20g of ethanol, 10g of ethylene glycol, 45g of N-methylpyrrolidone, 10g of sorbitol glycidyl ether, and 3g of a commercially available dispersant, and perform ball milling for 8 hours;

[0047] Add cross-linking agent: Add 3g of tetraethylenepentamine into the ball mill barrel, continue mixing for 20min, take out the ceramic slurry, and then carry out vacuum stirring to defoam;

[0048] Gel-injection molding: pouring the ceramic slurry into the mold for molding;

[0049]Demoulding and drying: place the ceramic body in an oven, dry at 60°C for 24 hours, and then dry at 100°C for 24 hours;

[0050] Degreasing: Put the dried ceramic body in a degreasing furnace to remove organic matter. The degreasing temperature is 500°C and the time is 3 hours;

[0051] Sintering: put the degreased green body into a sintering furnace for sintering, the sintering temperature is 1800°C, and the time is 3h. The fi...

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Abstract

The invention provides a method for net forming of aluminum nitride ceramics, which comprises the following steps: S1, weighing 95 wt% of aluminum nitride powder, 5 wt% of yttrium oxide powder and sorbitol glycidyl ether according to the proportion, and then adding a non-water-based organic solvent according to the proportion of 40-60% of the volume content; s2, fully mixing and ball-milling the materials to form non-water-based ceramic slurry; s3, tetraethylenepentamine is added, ball milling is carried out again, then defoaming is carried out, ceramic slurry is obtained, the ratio of sorbitol glycidyl ether to tetraethylenepentamine is (3-5): 1, and the total adding amount of sorbitol glycidyl ether and tetraethylenepentamine is 1-5 wt% of the weight of the ceramic powder; s4, injecting the ceramic slurry into a mold, and then demolding and drying to obtain a blank body; s5, degreasing the blank at high temperature; and S6, performing high-temperature sintering on the degreased blank.

Description

technical field [0001] The invention relates to a method applicable to the net shaping of aluminum nitride ceramics. Background technique [0002] Gel injection molding technology is a combination of ceramic body grouting molding technology and polymer chemistry theory, and the organic monomer and crosslinking agent that can form a gel are prepared into a premixed liquid with an organic solvent or water, and the ceramic After the powder is mixed, it is prepared into a ceramic slurry, which is poured into a mold and polymerized in situ under certain conditions to form a gel with a cross-bond structure to shape the ceramic body. It can be used for ceramic bodies of various complex shapes. precision molding. [0003] The Chinese patent "A Forming Method of Ceramic Body" (CN 108748611 A) discloses a forming method of pressure grouting, but this method uses water as a solvent, and aluminum nitride powder is easily hydrolyzed when it meets water. Not suitable for easily hydrolyz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/584C04B35/622C04B35/638
CPCC04B35/584C04B35/622C04B35/638C04B2235/3225C04B2235/6567C04B2235/96C04B2235/9607
Inventor 管军凯鲁慧峰刘佳威何庆
Owner 厦门钜瓷科技有限公司
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