Preparation method of spinel-mullite ceramic sagger

A mullite and spinel technology, which is applied in the field of spinel-mullite ceramic saggar preparation, can solve the problem that the density and strength uniformity of the four walls of the saggar cannot be guaranteed, and the use requirements of high-quality lithium battery materials cannot be met. , surface peeling off slag and other problems, to achieve the effect of good resistance to lithium ion corrosion, good crystalline state and good suspension

Active Publication Date: 2020-04-24
洛阳索莱特材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the sagger is a thin-walled product, the uniformity of density and strength of the four walls of the sagger cannot be guaranteed by mechanical pressing; therefore, the sagger usually suffers from low density, low strength, poor corrosion resistance, The phenomenon of peeling and slag on the surface cannot meet the requirements of high-quality lithium battery materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] A kind of preparation method of spinel-mullite ceramic sagger, its specific operation steps are as follows:

[0025] (1) Slurry preparation: Weigh fused magnesite spinel, fused mullite, alumina fine powder, aluminum titanate fine powder, zirconia, magnesite fine powder, clay fine powder according to the required parts by weight Mixing; weighing acrylamide, methylenebisacrylamide, ammonium persulfate, tetramethylethylenediamine, and water according to the required parts by weight; adding the above-mentioned raw materials and colloidal solution into a mixing tank and stirring to make a slurry;

[0026] (2) Injection molding: Vacuum the slurry mentioned in the previous step to remove air bubbles in the slurry, then inject it into a metal mold with a pressure pump, and heat the mold to 80-90°C to form the slurry Solidified body;

[0027] (3), demoulding: the metal mold described in the previous step is opened, and the green body is taken out;

[0028] (4) Drying: Dry the ...

Embodiment 1

[0032] A kind of preparation method of spinel-mullite ceramic sagger, its specific operation steps are as follows:

[0033] (1) Slurry preparation: Weigh 40% of fused magnesia-aluminum spinel, 25% of fused mullite, 15% of alumina micropowder, 5% of aluminum titanate fine powder, 5% of zirconia, Magnesium ore fine powder 5%, clay fine powder 5%; weigh 10% of acrylamide, 0.4% of methylenebisacrylamide, 0.6% of ammonium persulfate, 0.4% of tetramethylethylenediamine, and 88.6% of water; Add 100Kg of raw materials and 8Kg of colloidal solution into the mixing tank and stir for 4 hours to make a slurry;

[0034] (2) Injection molding: The slurry described in the previous step is vacuum-treated to remove the air bubbles in the slurry, and then injected into a metal mold with a pressure pump, and the mold is heated to 80°C, and the slurry forms a solidified body ;

[0035] (3), demoulding: the metal mold described in the previous step is opened, and the green body is taken out;

...

Embodiment 2

[0039] A kind of preparation method of spinel-mullite ceramic sagger, its specific operation steps are as follows:

[0040] (1) Slurry preparation: Weigh 50% of fused magnesia aluminum spinel, 15% of fused mullite, 20% of alumina micropowder, 4% of aluminum titanate fine powder, 5% of zirconia, Magnesite fine powder 3%, clay fine powder 3%; Acrylamide 14%, Methylene bisacrylamide 0.3%, Ammonium persulfate 0.5%, Tetramethylethylenediamine 0.3%, Water 84.9% ; Add 100Kg raw material and 12Kg colloidal solution into the mixing tank and stir for 6 hours to make a slurry;

[0041] (2) Injection molding: Vacuum the slurry described in the previous step to remove air bubbles in the slurry, then inject it into a metal mold with a pressure pump, and heat the mold to 90°C, the slurry forms a solidified body ;

[0042] (3), demoulding: the metal mold described in the previous step is opened, and the green body is taken out;

[0043] (4) Drying: Dry the green body at a temperature of 10...

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PUM

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Abstract

The invention discloses a preparation method of a spinel-mullite ceramic sagger, and relates to the spinel-mullite ceramic sagger. A ceramic sagger matrix is prepared from the following raw materialsand a colloidal solution, and the raw materials comprise the components in percentage by weight: 40-50% of fused magnesia-alumina spinel, 15-25% of fused mullite, 15-20% of aluminum oxide micro powder, 4-8% of aluminum titanate fine powder, 5-10% of zirconium oxide, 3-5% of magnesite micro powder and 3-5% of clay fine powder; the colloidal solution is a gel, and the gel comprises the components inpercentage by weight: 10-14% of acrylamide, 0.2-0.4% of methylene bisacrylamide, 0.4-0.6% of ammonium persulfate, 0.2-0.4% of tetramethylethylenediamine and the balance being water, wherein the weight of the gel accounts for 8%-12% of the total weight of the raw materials. The preparation method comprises the steps of slurry preparation, injection molding, demolding, drying and firing. A productsintered by the method is high in volume density, high in strength, high in thermal shock stability and excellent in use performance.

Description

technical field [0001] The invention relates to the field of spinel-mullite ceramics, in particular to a method for preparing a spinel-mullite ceramic sagger. Background technique [0002] As known, ceramic saggers are widely used in the calcination of positive electrode materials in the lithium battery industry. Lithium battery cathode materials mainly contain a large amount of lithium hydroxide or other forms of lithium salt compounds. Due to the small ion radius of lithium ions and strong alkalinity, the permeability and corrosion of lithium ions are very strong. The use requirements of very harsh use occasions are also very harsh. [0003] my country is the world's largest producer of lithium batteries, and the demand for ceramic saggers is very large, but most of them are shaped by traditional mechanical pressing methods. However, since the sagger is a thin-walled product, the uniformity of density and strength of the four walls of the sagger cannot be guaranteed by m...

Claims

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Application Information

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IPC IPC(8): C04B35/443C04B35/622C04B35/63C04B35/634
CPCC04B35/443C04B35/622C04B35/6303C04B35/63444C04B2235/3463C04B2235/3217C04B2235/3232C04B2235/3244C04B2235/3206C04B2235/349C04B2235/6022C04B2235/606C04B2235/656C04B2235/6567
Inventor 张拯雷复兴魏少西姜鹏田守信马文鹏
Owner 洛阳索莱特材料科技有限公司
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