Ceramic slurry as well as preparation method and application thereof

A ceramic slurry and raw material technology, applied in the field of ceramic slurry and its preparation, can solve problems such as poor stability, achieve the effects of increased yield and density, easy process control, enhanced strength and toughness

Pending Publication Date: 2021-03-09
SHANGHAI SANSI ELECTRONICS ENG +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a ceramic slurry and its preparation method and use, which are used to solve the problems of poor stability and obvious defects in the prior art.

Method used

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  • Ceramic slurry as well as preparation method and application thereof
  • Ceramic slurry as well as preparation method and application thereof
  • Ceramic slurry as well as preparation method and application thereof

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preparation example Construction

[0038]The preparation method of the ceramic slurry in this embodiment is as follows: mixing each raw material component and then ball milling, adding a pH regulator during the ball milling process to adjust the pH value of the ceramic slurry, and the output particle size of the ball milling is 0.5-3 μm.

[0039] In the embodiment of the present application, the ceramic slurry is formed by one-time feeding technology, followed by gel injection molding to form ceramics. The preparation method specifically includes the following steps:

[0040] 1) At 20°C and a humidity of 40%, after mixing the raw material components of each ceramic slurry with a catalyst and an initiator, they are added to the mold at one time for reaction, and then taken out from the mold after the reaction; the catalyst is tetramethanone Ethylenediamine, the initiator is ammonium persulfate;

[0041] 2) Then place it on a flat and air-permeable mesh screen, and let it stand for 10 hours at 20°C and 80% humidi...

Embodiment 1

[0048] In the present embodiment, the ceramic slurry comprises the raw material components of the following parts by weight:

[0049]

[0050] The pH value of the ceramic slurry is adjusted to 9-10 by a pH regulator.

[0051] The sintering aid is SiO 2 and TiO 2 According to the 1:1 formed mixture.

[0052] The dispersant in this embodiment is gum arabic powder.

[0053] Test results: The viscosity of the slurry prepared by this method is 175mPa·s, and there is no obvious stratification phenomenon after being placed at room temperature for 15 days. Use this batch of slurry to make ceramic products, the final fired ceramic yield is 93.6%, and the ceramic density is 3.74g / cm 3 ; The dimensional tolerance of ceramic products over 30mm is controlled within 1%.

Embodiment 2

[0055] In the present embodiment, the ceramic slurry comprises the raw material components of the following parts by weight:

[0056]

[0057] The pH value of the ceramic slurry is adjusted to 9-10 by a pH regulator.

[0058] The dispersant in this embodiment is gum arabic powder.

[0059] The sintering aid is SiO 2 and CaCO 3 According to the 1:1 formed mixture.

[0060] Test results: The viscosity of the slurry prepared by this method was 330mPa·s, and it was left at room temperature for 15 days without obvious stratification. Use this batch of slurry to make ceramic products, the final fired ceramic yield is 93%, and the ceramic density is 3.70g / cm 3 , The dimensional tolerance of ceramic products over 30mm is controlled within 1%.

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Abstract

The invention provides ceramic slurry as well as a preparation method and application thereof. The ceramic slurry comprises the following raw material components in parts by weight: 50-70 parts of aluminum oxide powder, 0.1-4 parts of a sintering aid, 15-20 parts of water, 1-5 parts of acrylamide, 0.05-1 part of N-N methylene bisacrylamide and 0.5-3 parts of a dispersing agent, wherein the pH value of the ceramic slurry is 9-10. The ceramic slurry is prepared by a one-time feeding technology, the preparation process is simple and easy to control, the slurry has good fluidity and stability, when the ceramic slurry is used for preparing ceramics, the surface of a ceramic green body has no obvious defects, the internal structure is compact, and meanwhile, the strength and toughness of the green body can be enhanced; and the yield and the density of the finally sintered ceramic are greatly improved.

Description

technical field [0001] The invention relates to the field of ceramic preparation, in particular to a ceramic slurry and its preparation method and application. Background technique [0002] Congealing molding of ceramic body is a new technology developed on the basis of traditional grouting molding. It forms a polymer network structure through the polymerization reaction of external organic monomers and cross-linking agents to solidify and shape ceramic powder in situ. . During this process, the loss of the solvent medium does not occur, and its volume basically does not shrink, and the initial bulk density of the gel body basically maintains the bulk density of the slurry itself. Therefore, obtaining a ceramic slurry with high solid content, low viscosity, good fluidity and stable dispersion is the key to the pouring technology. [0003] For example, the invention patent with the domestic application number CN201010516357.7 discloses a gel injection molding method, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622C04B35/632C04B35/64
CPCC04B35/10C04B35/622C04B35/64C04B35/632C04B2235/77
Inventor 何孝亮韩蕊邱燕邹成龙
Owner SHANGHAI SANSI ELECTRONICS ENG
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