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Ceramic slurry, ceramic device and preparation method thereof

A technology of ceramic slurry and ceramics, which is applied in the field of ceramic devices and its preparation, and ceramic slurry, which can solve the problems of unfavorable human health and environmental protection, lower product yield, and easy cracking of ceramic green body, and achieve high mechanical strength, Improve product yield and reduce cracking effect

Active Publication Date: 2021-06-22
HUAIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, only a few enterprises in China have mastered the gel injection molding technology of fused silica ceramic crucibles. The main problem faced by the gel injection molding technology is that the gelling agent is usually acrylamide, a neurotoxic gel monomer. , long-term exposure is not good for human health and environmental protection, and the ceramic green body prepared with low-toxicity gel is easy to crack, which reduces the product yield

Method used

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  • Ceramic slurry, ceramic device and preparation method thereof
  • Ceramic slurry, ceramic device and preparation method thereof
  • Ceramic slurry, ceramic device and preparation method thereof

Examples

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Effect test

preparation example Construction

[0045] The preparation method of above-mentioned ceramic slurry, comprises the following steps:

[0046] Provide the above-mentioned raw materials for ceramic slurry;

[0047] Fine fused silica powder, dispersant, gelling agent and water are mixed and ball milled, then coarse fused silica powder is added to continue ball milling to obtain ceramic slurry.

[0048] When the raw material of the ceramic slurry also includes an initiator, the initiator is added after the coarse fused silica powder is added and ball milling is completed. The initiator is added after the other components are fully mixed to avoid premature addition of the initiator to affect the uniformity of component mixing.

[0049] In this way, the fine fused silica powder, dispersant, gelling agent and water are first added to a ball mill and ground for a period of time; then the coarse fused silica powder is added to the above slurry and continued to be ground for a period of time to obtain a ceramic slurry. I...

Embodiment 1

[0061] Put 1 part of water, 2.6 parts of fine fused silica powder, dispersant, gelling agent, etc. into the ball mill and mill at a speed of 160rpm for 4 hours to prepare the initial fused silica slurry, and then add 1.4 parts to the above slurry The coarse fused silica powder of 1000mm of quality is continued ball milling 15min under the rotating speed of 120rpm, adds the ammonium persulfate (the aqueous solution that is pre-configured as 10% mass concentration) that accounts for 2% of gelling agent quality in the slurry after ball milling, obtains required ceramic slurry. Then vacuum defoam the ceramic slurry, pour it into the crucible mold after defoaming, place the mold in a water bath environment at 70°C for 1 hour, and then get the fused silica crucible body after demoulding, and the body is dried under temperature control and humidity control Afterwards, it is fired in a kiln at 1150°C for 5 hours to obtain a fused silica ceramic crucible. The median diameter of the fi...

Embodiment 2

[0063] Put 1 part of water, 3.3 parts of fine fused silica powder, dispersant, gel, etc. into the ball mill and mill at a speed of 220rpm for 5 hours to prepare the initial fused silica slurry, and then add 3.3 parts to the above slurry The thick fused silica powder of 1000g quality is that the rotating speed is 80rpm and continues ball milling 25min, adds the ammonium persulfate (the aqueous solution that is preconfigured as the aqueous solution of 10% mass concentration) that accounts for 2% of gelling agent quality in the slurry after ball milling to obtain required ceramic slurry. Then vacuum defoam the ceramic slurry, pour it into the crucible mold after degassing, place the mold in a water bath environment at 75°C for 1 hour, and then get the fused silica crucible body after demoulding, and the body is dried under temperature control and humidity control Afterwards, it is fired in a kiln at 1200°C for 3 hours to obtain a fused silica ceramic crucible. The median diamete...

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Abstract

The invention relates to a ceramic slurry, a ceramic device and a preparation method thereof. The ceramic slurry includes a main material, a gelling agent and a dispersant. The main material includes two types of fine fused silica powder and coarse fused silica powder. The fine fused silica The median particle size of the powder is 3 μm to 15 μm, the median particle size of the coarse fused silica powder is 0.2 mm to 3 mm, the mass of the gelling agent is 1% to 5% of the mass of the main material, and the mass of the dispersant is the mass of the main material 0.1% to 0.5% of the total. The above-mentioned ceramic slurry can not only ensure the mechanical strength of the manufactured ceramic device, but also reduce the shrinkage during subsequent drying and sintering, thereby effectively preventing cracking of the ceramic device during subsequent drying and sintering, and effectively improving the product yield. The ceramic slurry can be applied to low-toxic gelling agents such as N,N-dimethylacrylamide, N,N-methylenebisacrylamide, methylolacrylamide and pullulan, which is green and suitable for industrialization Mass promotion.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic materials, in particular to a ceramic slurry, a ceramic device and a preparation method thereof. Background technique [0002] With the intensification of the fossil energy crisis, the new sustainable energy industry has received global attention and developed rapidly. As a clean and inexhaustible energy source, solar energy has received great attention. The solar energy industry has developed rapidly in recent years. my country's solar energy industry has also achieved rapid development in recent years. At present, the installed capacity of solar power stations and solar cells The output of components ranks first in the world. As one of the core materials of solar cells, crystalline silicon has continuously increased its production capacity with the development of the solar industry. Fused silica ceramic crucible has become an irreplaceable key consumable in the production of poly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/14C04B35/632C04B35/634C04B35/636
CPCC04B35/14C04B35/632C04B35/6344C04B35/636C04B2235/5427C04B2235/5436
Inventor 万维罗俊荣于伟雷鑫
Owner HUAIHUA UNIV
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